Question
A racecar travels at 150 km/h and completes a track in 2
hours. A motorcycle completes the same track in 4 hours. If the racecar's speed is boosted by 10% and the motorcycle's speed is cut by 15%, what is the difference in their new speeds?Solution
ATQ, Distance = 150 × 2 = 300 km Speed of the motorcycle = 300 / 4 = 75 km/h Increased speed of the racecar = 150 × 1.10 = 165 km/h Decreased speed of the motorcycle = 75 × 0.85 = 63.75 km/h Required difference = 165 - 63.75 = 101.25 km/hr
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