Mathematics for IGCSE & O level - Ratio And Proportion (Section 1 - No. 16)
A blueprint has a scale of 1:50. If a room measures 10 cm by 15 cm on the blueprint, what are the actual dimensions?
5 m x 7.5 m
0.2 m x 0.3 m
500 cm x 750 cm
0.002 m x 0.003 m
Explanation
If scale is 1:50, then actual length is 50 times. 10 cm = 500cm = 5m, 15 cm = 750cm = 7.5m
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