Multiple choice

Pipe A fills a tank at 50 m3/hour. Pipe B takes 4 hours to fill the tank. When opened together, they fill the tank in 2 hours. What is the volume of the tank?

  1. 150 m3

  2. 100 m3

  3. 225 m3

  4. 200 m3
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let V be tank volume. Pipe B's rate = V/4 m³/hr (fills in 4 hours). Combined rate = 50 + V/4 = V/2 (fills in 2 hours). Solving: V/2 - V/4 = V/4 = 50, so V = 200 m³.

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