Mathematics for IGCSE & O level - Similarity (Section 2 - No. 32)
A model of a building is made to a scale of 1:50. A room in the model has dimensions 7.4cm by 9.8cm by 6.5cm. Calculate the floor area of the room in the actual building.
362.6 cm²
72.5 cm²
1.85 m²
18.13 m²
Forklaring
Floor area of model= 7.4cm x 9.8cm = 72.52 cm². Area scale factor = 50^2 = 2500. Actual area = 72.52 x 2500 = 181300 cm² = 18.13 m².