Three taps R, S and T can fill a tank in 90, 100 and 180 minutes respe – McqOptions

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1.	Three taps R, S and T can fill a tank in 90, 100 and 180 minutes respectively. If all the taps are opened together, then in how many minutes will the tank be filled?
A.	120
B.	37.5
C.	45
D.	90
Answer» C. 45

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