Question
Average speed of ‘A’ during a 24-hour journey is 30
km/h. If he covered the first 120 km of his journey at a speed of 10 km/h, then find the speed at which ‘A’ travelled during the remaining journey.Solution
Total distance covered by ‘A’ = 24 × 30 = 720 km Time taken to cover 120 km = 120/10 = 12 hours Time taken to cover remaining distance = 24 – 12 = 12 hours So, required speed = {(720 – 120)/12} = 50 km/h
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