Pipe A, pipe B and pipe C together can fill a tank in 20 minutes.... | Mathematics MCQ [Updated November 2026] | GkGet

1

Three taps A, B, and C can fill an empty tank in 30 minutes, 20 minutes, and 10 minutes respectively. When the tank is empty, all three taps are opened. Taps A, B, and C release chemical solutions P, Q, and R respectively. What is the proportion of solution R in the tank after 3 minutes?

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2

Two inlet pipes J and T can fill a tank in 120 minutes and 144 minutes respectively. If an outlet pipe Z is opened along with them, all three pipes together fill the tank in 240 minutes. How long will pipe Z alone take to empty the full tank?

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3

Pipes A and B together can fill a tank in 180 hours. Pipes B and C together can fill the same tank in 90 hours. Pipes A and C together can fill the same tank in 120 hours. In how many hours can pipe B alone fill the same tank?

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4

Three taps A, B, and C can completely fill an empty tank in 30 minutes, 20 minutes, and 10 minutes respectively. When the tank is empty, all three taps are opened. Taps A, B, and C discharge chemical solutions P, Q, and R respectively. What is the proportion of solution R in the tank after 3 minutes?

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5

Two pipes A and B can fill an empty tank in 40 hours and 60 hours respectively. Pipe C can empty the completely filled tank in 48 hours. Initially, both pipes A and B are opened, and after 20 hours pipe C is also opened. In how much total time will the tank be completely filled?

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6

Pipe A alone can fill a tank in 10 hours and Pipe B alone can fill the same tank in 12 hours. Both pipes are opened alternately for one hour each, starting with Pipe B for the first hour. In how much time will the tank be completely filled?

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7

Two pipes A and B can fill a large tanker in 60 minutes and 40 minutes, respectively. If pipe B is used for half the time and pipes A and B are used together for the other half of the time, how many minutes will it take to fill the empty tanker?

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8

Three pipes A, B, and C can fill a tank in 6 hours. After working together for 2 hours, C is closed, and A and B can fill the remaining part in 7 hours. How many hours will C alone take to fill the tank?

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Pipe A, pipe B and pipe C together can fill a tank in 20 minutes. However, due to a leak at the bottom, all three pipes take 10 minutes more to fill the tank completely. In how much time can the leak alone empty the full tank?

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Pipe A, pipe B and pipe C together can fill a tank in 20 minutes. However, due to a leak at the bottom, all three pipes take 10 minutes more to fill the tank completely. In how much time can the leak alone empty the full tank?

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