How many minutes does a car need for 45 km at a constant 90 km/h?
Answer and explanation
Correct answer: D. 30 min
- Step 1: Time in hours = 45 ÷ 90 = 0.5 h. Step 2. In minutes: 0.5 × 60 = 30 min. Answer: 30 min. Why not the others: 0.5 min results from having given the time in hours. 120 min results from having divided the speed by the distance. 50 min results from having used 100 minutes per hour.
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