A coach driver records one trip.Trip Distance (km) Time (hours) Depot to port 90 3
At the same average speed, how many hours would a 225 km journey take?
Answer and explanation
Correct answer: D. 7.5 hours
- Step 1: Speed = 90 / 3 = 30 km/h. Step 2. Time = 225 / 30 = 7.5 hours. Answer: 7.5 hours. Why not the others: 2.5 hours is the ratio of the distances, not a time (225 / 90); 4.5 hours is only the time for the extra 135 km beyond the recorded trip; 6.75 hours multiplies the recorded time by the distance divided by 100, which has no meaning here.
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