Standard Mathematics Primary 5 Volume

A rectangular tank with internal dimensions 30 cm long, 20 cm wide and 25 cm tall is partially filled with water to a height of 18 cm. What is the volume of water in the tank, in litres? (1 litre = 1000 cm³)

A 4.2 ℓ
B 10.8 ℓ
C 15 ℓ
D 108 ℓ
Show Worked Solution

Worked Solution

Step 1: The water forms a cuboid with the tank's base and a height equal to the water level. Water volume = length × breadth × water height = 30 × 20 × 18 = 600 × 18 = 10800 cm³. Step 2: Convert cm³ to litres using 1 litre = 1000 cm³. 10800 cm³ ÷ 1000 = 10.8 litres. Answer: 10.8 ℓ

Correct answer: 10.8 ℓ

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