Quantitative aptitude

Pipe P can fill a tank in 38 hours. Pipe Q alone can fill it in 19 hours. Pipe R can empty the full tank in 133 hours. If all the pipes are opened together, how much time will be needed to make the tank full?

July 26, 2023

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Pipe P can fill a tank in 38 hours. Pipe Q alone can fill it in 19 hours. Pipe R can empty the full tank in 133 hours. If all the pipes are opened together, how much time will be needed to make the tank full?

Question	Pipe P can fill a tank in 38 hours. Pipe Q alone can fill it in 19 hours. Pipe R can empty the full tank in 133 hours. If all the pipes are opened together, how much time will be needed to make the tank full?
Type	multiple_choice
Option	28 hours	incorrect
Option	95 hours	incorrect
Option	19 hours	incorrect
Option	14 hours	correct

Solution

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Pipe P can fill a tank in 38 hours. Pipe Q alone can fill it in 19 hours. Pipe R can empty the full tank in 133 hours. If all the pipes are opened together, how much time will be needed to make the tank full?

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A and B took a job for Rs. 7200. A alone can do it in 12 days. B alone can do it in 16 days. They completed the work in 6 days with the help of C. Find the share of C.

Pipe P can fill a tank in 38 hours. Pipe Q alone can fill it in 19 hours. Pipe R can empty the full tank in 133 hours. If all the pipes are opened together, how much time will be needed to make the tank full?

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A train is 31m long. It passes a platform which is 175 m long. What is the distance covered by the train in passing the platform?

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