Mathematics for IGCSE & O level - Ratio And Proportion (Section 2 - No. 42)
A line on a map is 4 cm long. The real-life distance is 20 km. What is the scale?
1:4
1:5
1:50000
1:500000
Explanation
4cm represents 20 km, then 1cm represents 5km, or 500,000cm. 1:500000
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