Mathematics for IGCSE & O level - Ratio And Proportion (Section 6 - No. 2)
A train travels 240 km at a constant speed in 3 hours. How long will it take to travel 320 km?
3 hours
3.5 hours
4 hours
4.5 hours
설명
Speed = 240/3 = 80 km/hr. Time = distance/speed = 320/80 = 4 hours.