An empty tank has a capacity of 5000 litres. Two pipes A and B are ope

Question

An empty tank has a capacity of 5000 litres. Two pipes A and B are opened simultaneously will the tank takes more than 500 minutes to fill?

(1) A can fill the tank at 5 litres/min
(2) B can fill the tank at 10 litres/min

shameekv1989 · Answer

i) A alone takes 1000 min to fill the tank, B's rate can be anything. If it is very high then they can together fill in less than 500 mins. If it very low then they can take more than 500 mins but less than 1000 mins. - Not Sufficient

ii) B alone can fill the tank in 500 minutes. Thus working together A and B can fill the tank in any time less than 500 minutes. Hence Sufficient

Answer - B

Nikkz99 · Answer

Do we need to assume that Pipe A doesn't empty the tank??

Bunuel   Krunaal   KarishmaB  anyone?

Thanks!

Bunuel · Answer

Yes, that's the assumption here. But you're right, the question should have been written more clearly to indicate in the stem that both pipes are filling pipes

An empty tank has a capacity of 5000 litres. Two pipes A and B are ope

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GMAT Data Sufficiency (DS) Questions

An empty tank has a capacity of 5000 litres. Two pipes A and B are ope

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