Question
A train moves at 90 km/h and needs to cover a journey in
2 hours. It halts for 10 minutes at the midpoint. What speed must it take for the second half?Solution
Total distance = 90 × 2 = 180 km
Half distance time = (90 ÷ 90) × 60 = 60 minutes
Time left = 120 – 60 – 10 = 50 minutes
Required speed = (90 ÷ 50) × 60 = 108 km/h
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