Time and work (method - 2)

 We solve time and work problems also by using time and efficiency. So now, we see hoe to solve in this method.

               

	A	B
Time T
Efficiency E

The table is the basic rule. Now when we fill the columns in table, Ta * Ea  = Tb * Eb

ie., efficiency should be appropriate. Here Efficiency is nothing but the ratio in reverse order.

Efficiencies should be noted in reverse order..  of ratios.

If Ratios of A and B are 2:3, then efficiencies must be.. 3:2… Now Ea=3 and Eb=2

Now,  work done is..W = T x E (of  either A or B, as both are same)

Work done by A = W/Ea                 ;(Ea=Efficiency of A)

Work done by B = W/Eb                  ; (Eb=Efficiency of B)

Work done by A+B = W/E(a+b)     ; (Ea+b=Sum of Efficiencies of A and B)

Example:

A can do a work in 10 days. B can complete the same work in 20 days. If they work together, how many days they take to complete.

Ans : 6 2/3 days

Solution:

    A   B

T  10 20                                                                                                 w = 20

E   2   1 (as Ratio of A and B but in reverse order…)            Wa+b = 20/3 = 6 2/3 days…

 Refer Method - 1 here..

IBPS Clerk III MORNING shift exam 1/Dec/2013

1.     Largest Producing Country for Coffee -- Brazil

2.     Who won Indira Gandhi Award for National Integration 2013-- M.S. Swaminathan

3.     World Diabetes day-- 14 November

4.     Who was the Miss Universe 2013-- María Gabriela Isler from Venezuela

5.     Which country hosted the 23rd CHOGM summit 2013-- Sri Lanka in Colombo

6.     Full form SLR-- Statutory Liquidity ratio

7.     Name the Indian who scored double century against Australia recently-- Rohit Sharma

8.     Nagarjuna Sagar Dam is located in which state-- Andhra Pradesh 

9.     Name the play back singer who got Bharat Ratna-- Lata mangeskar in 2001

10.  Indian Grand Prix winner 2013-- Sebastian Vettel (Red Bull)

11.  Widow pension scheme is named after- Indira Gandhi

12.  Magnetic ink character recognition (MICR) in cheque has how many character-- 9 digit

13.  Facility to with draw money for farmers is -- Kisan credit card

14.  Who is the author of Casual Vacancy-- J.K Rowling

15.  Largest Exporter Country of Gold- China

16.  Sergey Bubka is related with which sports-- Pole Vaulter

17.  At which place Indian Grand Prix was held-- Greater Noida, Uttar Pradesh

18.  Which organization working for welfare of women-

19.  ATM operated by non banking entities-- White Label ATM

20.  NSAP is related with which leader- Indira Gandhi

21.  Question related to Sec 46 Banking Regulation Act-

22.  Which product improves credit flow in agriculture-

23.  When you pay EMI for loans after some months: the interest and principal increases or decreases

24.  Converting physical share into electronic form- Demat Account

25.  Which of the following is not a negotiable instrument-

26.  A banknote of which portions missing or which is composed of more than two pieces is known as-

27.  NPCI 24x7 related- Remittance Processing Services

28.  Vodafone and ICICI launched unique mobile transfer called- M Pesa

29.  Banking Companies (Nomination) Rule 1985 related question

30.  SKOPJE is a birthplace of which famous personality-- Mother Teresa

31.  Cheque truncation means -

32.  Purchasing a commodity or security in one market for immediate sale in another market is known as- Arbitrage

33.  Whole sale banking is not intended to the need of:-

34.  Banking Ombudsman is a scheme by: RBI

35.   Online Alert Securities measures by RBI for: Debit/Credit card holders

36. Demand Deposit

37. Micro loans

38. Bank Draft

 Try posting questions that you know and help the others to get through the exam.

Easy method for Boats and Streams

Today i am going to discuss about Boats and streams problems. Observe the below image and note down in your paper as 3 different pictures. Then those are enough to answer any type of BOATS AND STREAMS problem. So, lets see how it works. First of all, see those three vertical broad lines. They denotes Up stream, Speed in still water, and Down stream. And the two small ones are both same, they are stream speeds. When you want to solve this boats problem, draw these lines and mention their appropriate numbers, given in the problem.

Now, we will take an example problem, to solve.

A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr, find the time taken by the boat to go 68 km downstream.

 

now, we will take another example to solve in this method.

In one hour, a boat goes 11 km/hr along the stream and 5 km/hr against the stream. The speed of the boat in still water (in km/hr) is:
Sol : You can see the difference between up(against) and Down (along or with)is 11-5 =6
as we have 2 stream speed lines, 6/2 = 3kmph is the stream speed.
now, subtract 3 from 11 or add 3 to 5 which implies 8 anyways.
hence still water speed is 8kmph.

This may take a while to remember. But with this it is easy to minimize time in our examinations.

NOTE : Here is a note to mention. When the arrow going to down stream, it is a plus. ie you need to add when it is down arrow. And Up arrow.. minus

 If you may find difficult to remember plus or minus sequence, one small hint is there. Always up stream is lesser than down stream. UP < DOWN

Here i am giving you some problems. Try solving it out.


1. A motorboat, whose speed in 15 km/hr in still water goes 30 km downstream and comes back in a total of 4 hours 30 minutes. What is the speed of the stream (in km/hr)

2. A man's speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr. The man's speed against the current is?

3. A boat running downstream covers a distance of 16 km in 2 hours while for covering the same distance upstream, it takes 4 hours. What is the speed of the boat in still water?

4. A boat covers a certain distance downstream in 1 hour, while it comes back in 1 hours. If the speed of the stream be 3 kmph, what is the speed of the boat in still water?

5. A man rows to a place 48 km distant and come back in 14 hours. He finds that he can row 4 km with the stream in the same time as 3 km against the stream. The rate of the stream is?

6. A man can row at 5 kmph in still water. If the velocity of current is 1 kmph and it takes him 1 hour to row to a place and come back, how far is the place?

7. The speed of a boat in still water in 15 km/hr and the rate of current is 3 km/hr. The distance traveled downstream in 12 minutes is?



Hope this is useful to you and understood. If there is any doubts, pls find time to post me. I'll try my best to answer you. And also if you find any mistakes, make a note of it too. :) see you

RBI computer awareness solved questions

Question 1: In an excel worksheet, the intersection of a row and a column is called ?

1. Column
2. Value
3. Address

4. Cell

5.

Correct Answer: 4.


Question 2: Translation and execution of a program line by line at run time is performed by which of the following?

1. Compiler
2. Interpreter
3. Linker
4. Loader
5.

Correct Answer: 2.


Question 3: In EXCEL, a workbook contains ______ worksheets by default.

1. One worksheet
2. Two worksheets
3. Three worksheets
4. Four worksheets
5.

Correct Answer: 3.


Question 4: How many number of address lines are required for 1 MB memory

1. 11
2. 16
3. 22
4. 24
5.

Correct Answer: 2.


Question 5: A linked list is an example of a _______ data structure

1. Linear
2. Non-Linear
3. Static
4. Dynamic
5.

Correct Answer: 4.


Question 6: Which key is used to switch to the full screen view while browsing the internet ?

1. F3
2. F5
3. F11
4. F9
5. F10

Correct Answer: 3.


Question 7: MS-Excel considers any set of characters containing a letter , hyphen, or space as _______

1. a formula
2. text
3. a name
4. a title
5.

Correct Answer: 2.


Question 8: Data can be sent over a serial communication link layer using a minimum of _____ wires

1. 1
2. 2
3. 4
4. 6
5.

Correct Answer: 2.


Question 9: Which function key is used to display "save as" box ?

1. F5
2. F6
3. F9
4. F12
5.

Correct Answer: 4.


Question 10: A number system with a base of two is referred as?

1. Octal number system
2. Unary number system
3. Binary number system
4. None of these
5.

Correct Answer: 3.


Question 11: A broad band communication channel can be considered as which of the following?

1. coaxial cable
2. fiber optics cable
3. microwave circuits
4. All of the above
5.

Correct Answer: 4.


Question 12: XSL stands for

1. Extensible Symmetric Language
2. Extensible Stylesheet Language
3. Extendible Symmetric Language
4. Extendible Stylesheet Language
5.

Correct Answer: 2.


Question 13: Which key combination is used to Change text to heading 3

1. Ctrl + 3
2. Alt + 3 
3. Alt + Ctrl + h3 
4. Ctrl + Alt + 3 
5.

Correct Answer: 4.


Question 14: What is an applet ?

1. is a compiled program that usually runs on the client
2. collects data from visitors to a Website
3. tracks the number of visitors to a Website
4. is an interpreted program that runs on the client
5. None of these

Correct Answer: 1.


Question 15: Which device used by Internet Service Providers to route incoming DSL connections to the Internet ?

1. Router
2. DSLAM
3. NIC Card
4. MODEM
5.

Correct Answer: 2.


Question 16: A program used to browse the web is called _______.

1. internet
2. browser
3. HTML
4. website
5.

Correct Answer: 2.


Question 17: The binary equivalent of the octal number 237 is _______

1. 010 011 111
2. 010 111 011
3. 011 101 101
4. 011 000 001
5.

Correct Answer: 3.


Question 18: What was the switching device used in the first generation computers ?

1. VLSI
2. Integrated Circuits
3. Germanium Transistors
4. Vaccuum Tubes
5.

Correct Answer: 4.


Question 19: Which of the following refers to a small, single-site network ?

1. DSL
2. RAM
3. USB
4. CPU
5. LAN

Correct Answer: 5.


Question 20: Third normal form is inadequate in situations where the relation

1. Has does not multiple candidate keys
2. Has candidate keys that are not composite
3. Has overlapped candidate keys
4. None of the above
5.

Correct Answer: 3.


Question 21: A system has 3 processes sharing 4 resources. If each process needs a maximum of 2 units then

1. deadlock may occur
2. deadlock can never occur
3. deadlock has to occur
4. None of these
5.

Correct Answer: 2.


Question 22: The name given to something that the computer will automatically do unless you specify otherwise?

1. a specification
2. a wildcard
3. a default
4. a rule 
5.

Correct Answer: 3.


Question 23: Softwares with malicious intent, such as viruses, worms and Trojan horses are known as ______

1. spyware
2. adware
3. spam
4. malware
5.

Correct Answer: 4.


Question 24: The computer program that are most commonly used are likely to be retrived from -

1. Cache memory
2. RAM
3. Registers
4. CDs
5.

Correct Answer: 1.


Question 25: Which shortcut key is used to delete cells, rows or columns?

1. CTRL+ Minus Sign
2. CTRL+ Plus Sign
3. CTRL+ Star Sign
4. CTRL+ Greater than Sign
5.

Correct Answer: 1.