Nixondutta wrote:

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

Source: Time4Education

5000 L is capacity. When both A & B are opened simul, will the tank take more than 500 mins to fill is the Q.

(1) A fills @ 5L/min ... so for 5000L -> A takes 1000 mins.

Not suff as we do not know what is the rate of B with this info.(2) B fills @ 10L/min ... so for 5000L -> B takes 500 mins.

Sufficient! even if A is not used , the whole tank will not take more than 500 mins to fill up.

So our answer is always "YES".Hence

Option (B) is our answer.

Best,

Gladi