# Time and Work Practice Problems – Set 5

Time and Work Practice Problems – Set 5
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
e) None of these
Solution:

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(1/5)
b) 9(2/5)
c) 9(3/5)
d) 10
e) None of these
Solution:

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 days
b) 15 days
c) 16 days
d) 18 days
e) None of these
Solution:

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 days
b) 22 1/2
c) 25 days
d) 30 days
e) None of these
Solution:

5. A alone can do a piece of work in 6 days and B alone 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.375
b) Rs.400
c) Rs.600
d) Rs.800
e) None of these
Solution:

6. If 6 men and 8 boys can do a piece of work in 10 days while 26 men and 48 boys can do the same in 2 days, the time taken by 15 men and 20 boys in doing the same type of work will be:
a) 4 days
b) 5 days
c) 6 days
d) 7 days
e) None of these
Solution:

7. A can do a piece of work in 4 hours; B and C together can do it in 3 hours, while A and C together can do it in 2 hours. How long will B alone take to do it?
a) 8 hours
b) 10 hours
c) 12 hours
d) 24 hours
e) None of these
Solution:

8. A can do a certain work in the same time in which B and C together can do it. If A and B together could do it in 10 days and C alone in 50 days, then B alone could do it in:
a) 15 days
b) 20 days
c) 25 days
d) 30 days
e) None of these
Solution:

9. A does 80% of a work in 20 days. He then calls in B and they together finish the remaining work in 3 days. How long B alone would take to do the whole work?
a) 23 days
b) 37 days
c) 37 1/2
d) 40 days
e) None of these