Question

Three taps P, Q and R are fitted in a tank manut catkey. The tap R is the tap emptying tank. Nal P and tank have the capacity to fill the tank separately in 12 minutes and 16 minutes. Shortly after opening the three taps simultaneously, tap R is closed, due to which the tank is filled in 20 minutes. In what time will Null R empty the entire tank?​

Answer 1

Answer:

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