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Question-1
A large tanker can be filled by two pipes A and B in 60 minutes and 40 minutes respectively. How many minutes will it take to fill the tanker from empty state if B is used for half the time and A and B fill it together for the other half?
(A)
15 min
(B)
20 min
(C)
27.5 min
(D)
30 min
Question-2
Three pipes A, B and C can fill a tank from empty to full in 30 minutes, 20 minutes, and 10 minutes respectively. When the tank is empty, all the three pipes are opened. A, B and C discharge chemical solutions P,Q and R respectively. What is the proportion of the solution R in the liquid in the tank after 3 minutes?
(A)
5/11
(B)
6/11
(C)
7/11
(D)
8/11
Question-3
A pump can fill a tank with water in 2 hours. Because of la leak, it took 2 1/3 hours to fill the tank. The leak can drain all the water of the tank in:
(A)
4 1/3 hours
(B)
7 hours
(C)
8 hours
(D)
14 hours
Question-4
Two pipes A and B together can fill a cistern in 4 hours. Had they been opened separately, then B would have taken 6 hours more than A to fill the cistern. How much time will be taken by A to fill the cistern separately?
(A)
1 hours
(B)
2hours
(C)
6hours
(D)
8hours
Question-5
A tap can fill a tank in 6 hours. After half the tank is filled, three more similar taps are opened. What is the total time taken to fill the tank completely?
(A)
3 hrs 15 min
(B)
3 hrs 45 min
(C)
4 hrs
(D)
4 hrs 15 min
Question-6
A tank is filled by three pipes with uniform flow. The first two pipes operating simultaneously fill the tank in the same time during which the tank is filled by the third pipe alone. The second pipe fills the tank 5 hours faster than the first pipe and 4 hours slower than the third pipe. The time required by the first pipe is:
(A)
6 hours
(B)
10 hours
(C)
15 hours
(D)
20 hours
Question-7
Three pipes A, B and C can fill a tank in 6 hours. After working at it together for 2 hours, C is closed and A and B can fill the remaining part in 7 hours. The number of hours taken by C alone to fill the tank is:
(A)
10
(B)
12
(C)
14
(D)
16
Question-8
A tank is filled in 5 hours by three pipes A, B and C. The pipe C is twice as fast as B and B is twice as fast as A. How much time will pipe A alone take to fill the tank?
(A)
20 hours
(B)
25 hours
(C)
35 hours
(D)
Cannot be determined
Question-9
Two pipes A and B can fill a cistern in 37 1/2 minutes and 45 minutes respectively. Both pipes are opened. The cistern will be filled in just half an hour, if the B is turned off after:
(A)
5 min.
(B)
9 min.
(C)
10 min.
(D)
15 min.
Question-10
Pipes A and B can fill a tank in 5 and 6 hours respectively. Pipe C can empty it in 12 hours. If all the three pipes are opened together, then the tank will be filled in:
(A)
(B)
(C)
(D)
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Advanced MCQs
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