Advanced Mathematics Primary 6 Volume

A rectangular tank with internal dimensions 30 cm by 20 cm by 25 cm is initially empty. Water flows into the tank at 1 200 cm³ per minute. After 10 minutes, find the depth of water in the tank.

A 20 cm
B 12 cm
C 24 cm
D 18 cm
Show Worked Solution

Worked Solution

Step 1: Total water volume after 10 min = 1 200 × 10 = 12 000 cm³. Step 2: Base area of tank = 30 × 20 = 600 cm². Step 3: Depth = volume ÷ base area = 12 000 ÷ 600 = 20 cm. Answer: 20 cm

Correct answer: 20 cm

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