A water tank has inlet and outlet.The inlet can fill only in 20 minutes and the outlet is capable of emptying the tank in 40 minutes.When the inlet was opened to fill the tank the outlet was open.So both were open in how much time will the tank get filled?
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inlet=20min=1/20 (A let)
outlet=40min=1/40 (B let)
hence, the work done by a&b
=a+b=1/20+(-1/40)=1/40
hence tank will get filled in 40 minutes.
outlet=40min=1/40 (B let)
hence, the work done by a&b
=a+b=1/20+(-1/40)=1/40
hence tank will get filled in 40 minutes.
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