Two pipes A and B can fill a cistern in 371 minutes and 45 minutes res – McqOptions

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Two pipes A and B can f..

1.

Two pipes A and B can fill a cistern in 37 1 minutes and 45 minutes respectively. Both
2

pipes are opened.The cistern will be filled just in half an hour, if the pipe B is turned off after :

A.

15 minutes

B.

10 minutes

C.

D.

5 minutes

E.

9 minutes

Answer» E. 9 minutes

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