Tap A can fill a tank in 40 hours and tap B can fill the same tank in – McqOptions

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1.	Tap A can fill a tank in 40 hours and tap B can fill the same tank in 50 hours. The two taps are opened simultaneously to fill the tank. After how long tap A will be closed so that the tank is filled in 25 hours.
A.	12 hours
B.	25 hours
C.	15 hours
D.	20 hours
Answer» E.

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