Question
The average speed of a car over the first 4 hours is 50
km/h. If the car needs to maintain an average speed of 60 km/h over a total of 8 hours, what should be its average speed for the remaining hours?Solution
ATQ,
Total distance required = 60 × 8 = 480 km
Distance covered in 4 hours = 50 × 4 = 200 km
Required distance = 480 - 200 = 280 km
Required average speed in remaining hours = 280 ÷ 4 = 70 km/h
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