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Mathematics for IGCSE & O level - Scale Drawings (Section 3 - No. 9)

What is the real length of an object if it measures 7 cm on a drawing with a scale of 1 cm to 4.5 m?
28.5 m
30.5 m
31.5 m
32.5 m

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7 cm * 4.5 m/cm = 31.5 m

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