Three pipes A, B and C can fill an empty tank in 15, 10 and 5 minutes – McqOptions

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1.	Three pipes A, B and C can fill an empty tank in 15, 10 and 5 minutes respectively. When the tank is empty, the three pipes are opened simultaneously. What is the part of work done by B and C?
A.	9/11
B.	12/11
C.	6/11
D.	2/11
Answer» B. 12/11

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