Mathematics for IGCSE & O level - Ratio And Proportion (Section 4 - No. 40)
A train travels at a constant speed. If it travels 300 km in 2.5 hours, how far will it travel in 3.5 hours?
350 km
420 km
480 km
500 km
คำอธิบาย
Speed = 300/2.5 = 120 km/hr. Distance = 120 * 3.5 = 420 km.