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Mutua had a tank which had two taps A and B.

Mutua had a tank which had two taps A and B. Tap A takes 5 and a third minutes to fill the tank and tap B takes 10 minutes to empty the tank. Starting with a tank ¾ full, how long will it take to fill the tank if both taps are opened at the same time?

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Wilfykil answered the question on August 20, 2019 at 12:26

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Next: A cylindrical storage tank of diameter 14 cm is initially two thirds full of water. The tank is filled by a pipe of internal diameter...

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