Mathematics for IGCSE & O level - Similarity (Section 2 - No. 14)
A model aircraft is made to a scale of 1:50. The area of the wing on the model is 18 cm². What is the area of the wing on the real aircraft?
45 cm²
450 cm²
45000 cm²
450000 cm²
Explanation
Length scale factor is 50. Area scale factor is 50^2 = 2500. Area of real wing = 18 * 2500 = 45000 cm²
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