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Mathematics for IGCSE & O level - Ratio And Proportion (Section 1 - No. 17)
A model plane has a wing span of 15cm, and the scale is 1:200. What is the real wing span in meters?
0.3 m
3 m
30 m
300 m
Förklaring
15 cm * 200 = 3000cm, which is 30 meters
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