Q: A pipe of diameter ‘d’ can drain a certain water tank in 40 min – McqOptions

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1.	Q: A pipe of diameter ‘d’ can drain a certain water tank in 40 minutes. The time taken by a pipe of diameter ‘2d’ for doing the same job in:
A.	5 minutes
B.	10 minutes
C.	20 minutes
D.	80 minutes
Answer» C. 20 minutes

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