Mathematics for IGCSE & O level - Similarity (Section 3 - No. 10)
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
คำอธิบาย
Area scale factor = 50^2 = 2500. Real area = 18 * 2500 = 45000 cm².