Two pipes can fill a tank in 10 hours and 15 hours respectively. Both together can fill it in:
12 1/2 hours
5 hours
6 hours
7 hours
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?
8 hours
10 hours
12 hours
24 hours
Rahul can do a piece of work in 20 days while Santhosh can do it in 12 days. Santhosh worked at it for 9 days and left. Rahul can finish the remaining work in
11 days
7 days
5 days
3 days
A and B can do a piece of work in 45 and 40 days respectively. They began to work together but A leaves after sometime and B finished the remaining work in 23 days. After how many days did A leave?
6 days
8 days
9 days
12 days
A tyre has two punctures. The first puncture alone would have made the tyre flat in 9 minutes and the second alone would have done it in 6 minutes. If air leaks out at constant rate, how long does it take both the punctures together to make it flat?
1 1/2 minutes
3 1/2 minutes
3 3/5 minutes
4 1/4 minutes
A tap can empty a tank in one hour . A second tap can empty it in 30 minutes. If both the taps operate simultaneously, how much time is needed to empty the tank?
20 minute
30 minute
40 minute
45 minute
A can do a piece of work in 30 days while B can do it in 40 days. A and B working together can do it in
70 days
42 3/4 days
27 1/7 days
17 1/7 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?
15 days
16 days
18 days
A and B can together finish a work in 30 days. They worked together for 20 days and then B left. After another 20 days, A finished the remaining work. In how many days A alone can finish the work?
40
50
54
60
A can finish a work in 18 days and B can do the same work in 15 days. B worked 10 days and left the job. In how many days, A alone can finish the remaining work?
5
5 1/2
6
8
