Mathematics for IGCSE & O level - Similarity (Section 2 - No. 43)
A tray has an area of 169 cm². What is the area of a similar tray whose lengths are one and a half times as large?
253.5 cm²
380.25 cm²
400 cm²
422.5 cm²
Explicació
Length scale factor is 1.5, area scale factor = (1.5)² = 2.25; Area of the tray = 169 * 2.25 = 380.25 cm².