Question

Two pipes A and B would fill a cistern in
$37 \times \frac{1}{2}$
minutes and 45 minutes respectively . Both pipes being opened , find when the second pipe must be turned off , so that the cistern may be filled in half an jour​

Answer 1

According to question,

cistern fills in 30 minutes

So pipe A worked for 30 minutes

It filled = 30×6=180units

Remaining capacity = 225−180 = 45 units

So this remaining capacity must be filled by B

B must have filled it in455=9min.

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Answer 2

Answer:

the answer is option (b)

Step-by-step explanation:

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