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Aptitude - Time and Work

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Overview

Exercise

"If you judge people, you have no time to love them."
- Mother Teresa
1. 

A can do a work in 15 days and B in 20 days. If they work on it together for 4 days, then the fraction of the work that is left is :

A.

1
4

B.

1
10

C.

7
15

D.

8
15


2. 

A can lay railway track between two given stations in 16 days and B can do the same job in 12 days. With help of C, they did the job in 4 days only. Then, C alone can do the job in:

A.

9 1 days
5

B.

9 2 days
5

C.

9 3 days
5

D. 10

3. 

A, B and C can do a piece of work in 20, 30 and 60 days respectively. In how many days can A do the work if he is assisted by B and C on every third day?

A. 12 daysB. 15 days
C. 16 daysD. 18 days

4. 

A is thrice as good as workman as B and therefore is able to finish a job in 60 days less than B. Working together, they can do it in:

A. 20 daysB.
22 1 days
2
C. 25 daysD. 30 days

5. 

A alone can do a piece of work in 6 days and B alone in 8 days. A and B undertook to do it for Rs. 3200. With the help of C, they completed the work in 3 days. How much is to be paid to C?

A. Rs. 375B. Rs. 400
C. Rs. 600D. Rs. 800




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