Mathematics for IGCSE & O level - Similarity (Section 1 - No. 13)
A tray has an area of 160 cm². What is the area of a similar tray whose lengths are one and a half times as large?
240 cm²
360 cm²
1440 cm²
480 cm²
Giải thích
The length scale factor is 1.5. The area scale factor is 1.5^2 = 2.25. Area = 160 * 2.25 = 360 cm²