Question

6 pipes are required to fill a tank in 1 hour. How long will it take if only 5 pipes of the same type are used

Answer 1

your question is wrong it should be something els

Answer 2

if the number of pipes is decreasing to 5 so the time will increase

so it will become 6 × 60 minutes = 5x

360 = 5x

X 360/5= 72 minutes = 1hr 12 minutes

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