Mathematics for IGCSE & O level - Ratio And Proportion (Section 1 - No. 25)
The scale on a model is 1:10. If the model car is 12 cm long, what is the actual length of the car?
1.2 cm
12 cm
120 cm
1200 cm
Explication
1:10, model is 12 cm, then real length is 12*10 = 120cm