Mathematics for IGCSE & O level - Rates (Section 1 - No. 41)
If a cyclist travels 0.6 km in 3 minutes, what is their average speed in km/h?
10 km/h
12 km/h
15 km/h
18 km/h
Giải thích
Speed = Distance / Time. 3 minutes = 0.05 hours. 0.6 km / 0.05 hours = 12 km/h