2025 CGS PRELIMS P1 Q3

2025 CGS PRELIMS P1 Q3

Secondary 4
3 marks

The density of gold is \(19.32\text{ g/cm}^3\). The mass of a gold bracelet is \(37.51\text{ g}\).

  1. By rounding these numbers correct to 2 significant figures, find an estimate of the volume of the gold bracelet. Show the numbers you use.[2]
  2. Without doing any further calculation, explain why the actual volume of the gold bracelet is less than the answer to part (a).[1]

Solution:

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Answer:(a) \(2\text{ cm}^3\) (b) The estimate uses a larger numerator and smaller denominator

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