Pipe a can fill a tank in 36 hrs & b can empty a tank in 45 hours. If both the pipes are opened simultaneously, how much time both will take to fill/empty the tank (in hrs)?
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answer pipe a and b can fill tank in 20 hours
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Answer:
Answer : 180 hrs.
Step-by-step explanation:
Time to fill a tank by Pipe A = 36 hrs.
So, time to fill a tank by Pipe A in 1 hr = 1/36.
Similarily, time to empty a tank by Pipe B = 45 hrs.
Time to empty a tank by Pipe B in 1 hr = 1/45.
Total work in 1 hr = 1/36 - 1/45
= 1/180.
Therefore,
Time taken to fill/empty a tank when both the tanks are opened simultaneously = 1/1/180 = 180 hrs.
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