Math, asked by pinky9224, 1 year ago

Two pipes can fill (or empty) a cistern in 5 and 4 hours while working alone. If both
pipes are opened together, then the time taken to fill (or empty) the cistern?
a. 9 hrs
b. 1 hr
c. 20 hrs
d. 20/9 hrs

Answers

Answered by RohitKawade

0

d. 20/9 hrs is the answer.

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