HPSC HCS 2021 · Question 144 of 177

A tank is normally filled in 6 hours but takes 4 hours longer to fill because of a leak in its bottom. If the tank is full, then the leak will empty it in how much time?

Pipes & Cisterns

Answer: D. 15 hr

1/6 − 1/x = 1/10 (leak slows filling from 6 to 10 hours), so the leak empties the tank in 15 hours.

Source: HPSC HCS (Ex.Br.) Prelims Paper-II (CSAT) held 12-Sep-2021 (prepp.in compilation); answers per official HPSC answer key

Practice the full HPSC HCS 2021 paper

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HPSC HCS 2021 · Question 144 of 177

Pipes & Cisterns

1/6 − 1/x = 1/10 (leak slows filling from 6 to 10 hours), so the leak empties the tank in 15 hours.

Source: HPSC HCS (Ex.Br.) Prelims Paper-II (CSAT) held 12-Sep-2021 (prepp.in compilation); answers per official HPSC answer key

Practice the full HPSC HCS 2021 paper

Timed test with all 177 questions, just like the real exam.