Question
A woman must travel 500 km in 10 hours. If she traveled
the first 30% of the journey at a constant speed of 50 km/h, at what speed must she travel the remaining distance so that she finishes the journey on time?Solution
ATQ, 30% of 500 = 150 km Time taken to travel 150 km = 150 ÷ 50 = 3 hours Remaining distance = 500 - 150 = 350 km Remaining time = 10 - 3 = 7 hours So, speed at which remaining distance is to be traveled = 350 ÷ 7 = 50 km/h
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