Question Paper from: IBPS Clerk Prelims 2016

Two pipes A and B can fill a tank in 16 hrs and 12 hrs respectively. The capacity of the tank is 240 litres. Both the pipes are opened simultaneously and closed after 2 hrs. How much more water (In Liters) needed to fill the tank?

100

170

190

None of these

Solution:

Chapter Name: Pipes and cisterns

Per hour fill by A & B = $\frac{1}{16}$ + \frac{1}{12} = \frac{7}{48}

Tank filled in 2 hours = $\frac{14}{48}$ $\times$ 240 = 70 ℓ

Water needed to fill the tank = 240 − 70 = 170 ℓ

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IBPS Clerk Prelims 2016

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