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A container can be filled by two pipes P1 and P2 in 40 hours and 20 hours respectively. It will take ________ hours to fill the container f…

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A container can be filled by two pipes P₁ and P₂ in 40 hours and 20 hours respectively. It will take ________ hours to fill the container from empty state if P₂ is used for half the time and P₁ and P₂fill it together for the other half.

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Discussion 1

CCommunity14 Jul 2019

Let the tank is filled in x hour

Then,

⇒ x/2(3/40 + 1/20) = 1

⇒ x/2 × 1/8 = 1

⇒ x/16 = 1

⇒ x = 16 hour