Problem-Solving and Data AnalysisVery hardDistance from a ratio scale
Problem-Solving and Data Analysis practice question
A map has a scale of 1 : 25,000. Two farms are 6.4 centimetres apart on the map. How many kilometres apart are the farms? (1 kilometre = 100,000 centimetres)
Answer: 1.6
6.4 × 25,000 = 160,000 cm, and 160,000 ÷ 100,000 = 1.6 km.
Common wrong answers
- If you answered 16
- 16 misplaces the decimal point.
- If you answered 160
- 160 stops at metres (160,000 cm = 1,600 m) with a slip in the conversion.
- If you answered 0.16
- 0.16 divides by 1,000,000 instead of 100,000.
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