Mathematics for IGCSE & O level - Scale Drawings (Section 2 - No. 18)
On a plan of a house, a room is 5 cm by 4 cm. If the scale is 1 cm to 2.5 m, what is the real area of the room?
20 m²
25 m²
50 m²
75 m²
설명
5 cm * 2.5 m/cm = 12.5 m. 4 cm * 2.5 m/cm = 10 m. Area = 12.5 m * 10 m = 125m²