Math, asked by maheshgupta10071981, 1 year ago

seven pipes are required to fill a tank in 1h 20min. how long will it take if two pipes are out of order

Answers

Answered by krshvn24

1

Answer:

9hr 20 min

Step-by-step explanation:

7pipes. -. 80 min

2pipes. -. ?

inverse proportion

7×80= 560 min

560 min= 9 hr 20 min

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