Nurul's cubical wooden toy block has a volume of 64 cm³. What is the length of one edge of the block?
Need a hint?
Look for a number that gives 64 when multiplied by itself three times.
Worked answer
- For a cube, volume = edge length × edge length × edge length.
- Since 4 × 4 × 4 = 64, the edge length is 4 cm.
Answer: 4 cm
The mistake this question tests
Habit
Calculation slip
Taking the square root of 64 gives 8 cm, but the volume of a cube uses three equal factors, not two.
How to fix it at home →Wrong answers children often give:
- 8 Calculation slip
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See the answer →Practise PSLE area & volume until the mistakes stop.
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