1. A can complete a piece of work in 16 days and B in 24 days. In what time they complete if they work together?
Ans: 9.6 days
2. A tap can fill a cistern in 8 minutes and another can fill it in 12 minutes. If both are opened simultaneously, find the time that the cistern will be full.
Ans: 4.8 min
Explanation:
3. If a pipe fills a tank in 15 minutes and a leak in the bottom empties it in 25 minutes, when both function simultaneously then in what time can the tank be filled?
Ans: 37.5 min.
Explanation:
4. A can reap a field in 8 days while A and B together can reap the same field in 6 days. In how many days will B alone can reap that field?
Ans: 24
Explanation:
5. 32 men can do a piece of work in 18 days. In how many days can 36 men do that work?
Ans: 16 days
6. Two pipes A and B can fill a tank in 4 and 5 hours respectively. A drain pipe C can empty a full tank in 8 hours. In what time can the tank be filled when all the three are open simultaneously?
Ans:
Explanation:
Ans: 12 days
Explanation
Total number of mandays = 15× 600 = 9000
Number of mandays completed = 5 × 600
= 3000
Remaining mandays = 9000 − 3000 = 6000
Number of soldiers = 600 − 100 = 500

Ans: 4 days

Ans: 7.5 minutes
Explanation:

Ans: 25
Explanation:

Ans: 20 hours
Explanation:

Ans: 5.6 days
Number of mandays completed in 5 days = 5 ×16 = 80
Remaining mandays = 192 − 80 = 112
Number of men available now = 16 + 4 = 20

Ans:

Ans: 15 days
Ans: 4
Explanation: Let the number of persons required to complete the work be 'x'



4 more men are required


Ans: 45
Explanation: Let the work take 'x' more days



Ans: 112 Hours