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) ¼
- (b) 1/10
- (c) 7/15
- (d) 8/15
- (d) 8/15
A can lay railway track between two given stations in 16 days and B can do the same job in 12 days. With the help of C, they did the job in 4 days only. Then, C alone can do the job in:
- (a) 9 days
- (b) 9× 2/5 days
- (c) 9 × 3/5 days
- (d) 10 days
- (c) 9 × 3/5 days
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) 18 days
- (d) 16 days
- (b) 15 days
A is thrice as good a 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 ½ days
- (c) 25 days
- (d) 30 days
- (b) 22 ½ days
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. 375
- (b) Rs. 400
- (c) Rs. 800
- (d) Rs. 900
- (b) Rs. 400
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
- (c) 6 days
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
- (c) 12 hours
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
- (c) 25 days
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 ½ days
- (c) 2 days
- (d) 40 days
- (b) 37 ½ days
A machine P can print one lakh books in 8 hours, machine Q can print the same number of books in 10 hours while machine R can print them in 12 hours. All the machines are started at 9 A.M. while machine P is closed at 11 A.M. and the remaining two machines complete the work. Approximately at what time will the work (to print one lakh books) be finished?
- (a) 11:30 AM
- (b) 12 noon
- (c) 12:30 PM
- (d) 1:00 PM
- (d) 1:00 PM