Question
Average speed of ‘A’ during a 22-hour journey is 22
km/h. If he covered the first 280 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’ = 22 × 22 = 484 km Time taken to cover 280 km = 280/20 = 14 hours Time taken to cover remaining distance = 22 – 14 = 8 hours So, required speed = {(484 – 280)/8} = 25.5 km/h
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