Question
A bus driver drives at 45 km/h and is supposed to reach
in 2 hours. He stops for 30 minutes after halfway. What speed is needed for the rest of the trip?Solution
Total distance = 45 × 2 = 90 km
Half time = (45 ÷ 45) × 60 = 60 minutes
Time left = 120 – 60 – 30 = 30 minutes
Required speed = (45 ÷ 30) × 60 = 90 km/h
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