Suppose a river is 1,900 km long. If a boat drifts at 4 km per hour without stopping, about how many days does 1,900 km take to cover?
Answer and explanation
Correct answer: B. About 20 days
- Step 1: Divide the distance by the speed: 1,900 / 4 = 475 hours.
- Step 2: Divide by 24 hours per day: 475 / 24 is about 19.8, so about 20 days.
Answer
About 20 days, since 1,900 divided by 4 is 475 hours
Why not the others: The others use a wrong speed or forget to convert hours into days.
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