chefmaryrusso chefmaryrusso

01-05-2021
Mathematics

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A pool can be filled by one pipe in 8 hours and by a second pipe in 2 hours. How long will it take using both pipes to fill the pool?

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eliezerkafunya eliezerkafunya

01-05-2021

let the time taken to be filled by both pipes be y

1/2 +1/8=1/y

(4+1)/8=1/y

5/8=y

cross multiplying

5y=8

y=8/5

=1.6hrs

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