CAT 2021 Time and Work Question (Medium)

Question

Pipe X can fill a tank in 12 hours and pipe Y can empty the tank in 18 hours. Both pipes are opened at 8 am and after some time Y is closed, and the tank is full at 10 pm on the same day. At what time was pipe Y closed?

Optima Learn · Accepted Answer

To find when pipe Y was closed, we need to set up the fill equation for the time both pipes ran together versus the time only X ran. Understanding the setup X fills at 1 12 tank hour, Y empties at 1 18 tank hour. Both run from 8 am, Y is closed after t hours, and the tank is exactly full at 10 pm 14

CAT 2021 Time and Work — Previous Year Question

CAT 2021

Quantitative

Time and Work

Medium

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