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?
12 days
15 days
16 days
18 days
A pipe can fill a tank in x hours and another can empty it in y hours. They can together fill it in (y > x) :
(x - y) hours
(y - x) hours
xy/(x - y) hours
xy/(y - x) hours
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
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:
1/4
1/10
7/15
8/15
A cistern can be filled by a pipe in 15 hours. But due to a leak in the bottom the cistern is just full in 20 hours. When the cistern is full, the leak can empty it in:
60 hours
40 hours
45 hours
30 hours
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
10 women can complete a work in 7 days and 10 children take 14 days to complete the work. How many days will 5 women and 10 children take to complete the work?
3
7
Cannot be determined
A and B can together do a piece of work in 15 days. B alone can do it in 20 days. A alone can do it in
30 days
40 days
45 days
60 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 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
