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A cistern can be filled by two pipes in 30 and 40 min respectively. Both the pipes are opened at once, When the first pipe be turned off so that the tank may be just filled in 18 min? A. 12.5 min B. 13.5 min C. 14.5 min D. 16.5 min

A cistern can be filled by two pipes in 30 and 40 min respectively. Both the pipes are opened at once, When the first pipe be turned off so that the tank may be just filled in 18 min?
A. 12.5 min
B. 13.5 min
C. 14.5 min
D. 16.5 min

Grade:12th pass

1 Answers

Pawan Prajapati
askIITians Faculty 60796 Points
2 months ago
Our expert is working on this Class IX Maths answer. We will update the answer very soon.

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