There are 7 pipes attached with a tank out of which some are inlets and some are outlets. Every inlet can fill the tank in 10 h and every outlet can empty the tank in 15 h. When all the pipes are opened simultaneously, the tank is filled up in 28/11 h. Find the numbers of inlets and outlets. ?

There are 7 pipes attached with a tank out of which some are inlets an

1.	There are 7 pipes attached with a tank out of which some are inlets and some are outlets. Every inlet can fill the tank in 10 h and every outlet can empty the tank in 15 h. When all the pipes are opened simultaneously, the tank is filled up in 2⁸/₁₁ h. Find the numbers of inlets and outlets. ?
A.	5, 2
B.	6,1
C.	4,3
D.	3,4
Answer» B. 6,1

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There are 7 pipes attached with a tank out of which some are inlets and some are outlets. Every inlet can fill the tank in 10 h and every outlet can empty the tank in 15 h. When all the pipes are opened simultaneously, the tank is filled up in 28/11 h. Find the numbers of inlets and outlets. ?

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