HOTS Mathematics Primary 5 Length and Mass

A crate of apples from the Geylang Serai market has a total mass of 23.5 kg. When 2/5 of the apples are removed, the total mass of the remaining apples and the crate becomes 15.1 kg. What is the mass of the empty crate?

A 2.5 kg
B 4.2 kg
C 8.4 kg
D 15.1 kg
Show Worked Solution

Worked Solution

Step 1: Find the mass of the apples that were removed (2/5 of all apples). Mass removed = 23.5 − 15.1 = 8.4 kg Step 2: Since 8.4 kg represents 2/5 of the total apple mass, find the total apple mass. Total apple mass = 8.4 ÷ (2/5) = 8.4 × (5/2) = 21 kg Step 3: Find the mass of the empty crate. Mass of empty crate = 23.5 − 21 = 2.5 kg The empty crate has a mass of 2.5 kg.

Correct answer: 2.5 kg

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