Mathematics for IGCSE & O level - Proportion (Section 3 - No. 34)
The distance a car travels is directly proportional to the time it travels. If a car travels 100km in 2 hours, how far will it travel in 5 hours?
200 km
250 km
300 km
50 km
解释
Distance = k * time. k = 100/2 = 50. So, distance = 50 * 5 = 250.