Question

5 pipes can fill a tank in 80 min .how long will it take to fill the tank if 8 pipe are used
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Answer 1

Answer:

1 hr and 10 mins will be 70mins

So 8 pipes take 70 mins to fill a tank.

The more number of pipes, the less time it takes to fill a tank. In this case, the tank is a constant as there is only 1 tank needed to be filled.

y=k/x

let y be time

let x be number of pipes

70=k/8

k= 70(8)

k= 560

y=560/5

y= 112mins

y= 1hr 52mins