One tap can empty a tank in one hour, another tap can empty the same t – McqOptions

MCQOPTIONS

1.	One tap can empty a tank in one hour, another tap can empty the same tank in 30 minutes, if both the taps are turned on simultaneously, how much time will take to empty the tank?
A.	20 minutes
B.	23 minutes
C.	90 minutes
D.	12 minutes
Answer» B. 23 minutes

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