Question
An individual travels 300 kilometres, part by scooter and
part by bus. The speed of scooter is 40 km/h and the bus is 80 km/h. If the scooter covers 40% of the route, determine the approximate average speed of the entire trip.Solution
ATQ,
Time taken by scooter = (0.40 × 300) / 40 = 120 / 40 = 3 hours
Time taken by bus = (0.60 × 300) / 80 = 180 / 80 = 2.25 hours
Average speed = 300 / (3 + 2.25) = 300 / 5.25 ≈ 57 km/h
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