Problem-Solving and Data AnalysisVery hardDensity of a metal block
Problem-Solving and Data Analysis practice question
A rectangular block of metal measures 2 cm by 3 cm by 5 cm and has a mass of 240 grams. What is the density of the metal, in grams per cubic centimetre?
Answer: 8
Volume = 2 × 3 × 5 = 30 cm³, so density = 240/30 = 8 g/cm³.
Common wrong answers
- If you answered 24
- 24 divides by the sum of the dimensions, 10.
- If you answered 48
- 48 divides by 5, the largest dimension, instead of the volume.
- If you answered 0.125
- 0.125 divides the wrong way round.
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