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Vineesh Nair

· started a discussion

· 1 Months ago

A tank can be f ill ed by t wo pipes in 20 minutes and 30 minutes respectively. When the tank was empty, the two pipes were opened. After some time, the first pipe was stopped and the tank was filled in 18 minutes. After how much time of the start was the first pipe stopped ?

A. 5 minutes
B. 8 minutes
C. 10 minutes
D. 12 minutes

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GORIGA SHIVASHANKER

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· 1 Months ago

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