Category: Mathematics | Last updated: 2026-09-18

A tank is filled in 8 hours by pipe A and emptied in 12 hours by pipe B. If both are open, tank fills in:

A) 16 hours

B) 20 hours

C) 24 hours

D) 32 hours

Explanation

Net rate = 1/8 - 1/12 = 1/24 per hour. Time = 24 hours.

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