Question
Average speed of ‘A’ during a 40-hour journey is 36
km/h. If he covered the first 160 km of his journey at a speed of 20 km/h, then find the speed at which ‘A’ travelled during the remaining journey.Solution
Total distance covered by ‘A’ = 40 × 36 = 1440 km Time taken to cover 160 km = 160/20 = 8 hours Time taken to cover remaining distance = 40 – 8 = 32 hours So, required speed = {(1440 – 160)/32} = 40 km/h
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