Question

Pipe ‘A’ can fill a tank in 20 hours while pipe

Q: Answer-Pipe ‘A’ can fill a tank in 20 hours while pipe ‘B’ takes 32 hours to empty it. Pipe ‘A’ is opened a...

Let the total capacity of the tank be 160 units Efficiency of pipe A 16020 8 unitshour Efficiency of pipe B 16032 5 unitshour Tank filled in 14 hours 14 8 112 units Therefore, required time taken to fill the remaining tank 160 1128 5 16 hours Therefore, total time taken 14 16 30 hours

‘B’ takes 32 hours to empty it. Pipe ‘A’ is opened alone when the tank was empty and after 14 hours pipe ‘B’ is also opened. In how much time will the tank get filled completely?

A 35 hours

B 32 hours

C 30 hours

D 38 hours

E None of these

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