Mathematics for IGCSE & O level - Scale Drawings (Section 2 - No. 19)
If a room measures 4 cm by 6 cm on a scale drawing where 1 cm represents 3 m, what is the real-life area of the room?
36 m²
72 m²
144 m²
288 m²
คำอธิบาย
4 cm * 3 m/cm = 12m, 6 cm * 3 m/cm = 18 m. Area = 12 * 18 = 216 m²