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1. Hasan can run 10 miles per hour, whilr Jack can run only 8 miles per hour. If they start at the same time from the same point and run is opposite direction, how far apart (to the nearest mile) will they be after 10 minutes?
- A. 3 miles
- B. 3 miles
- C. 3 miles
- D. 3 miles
Answer: Option A
Explanation:
Choice A is correct. We could treat this as a regular distance problem and make up a table that would solve it, but there is an easier way here, if we consider the quantity representing the distance between the boys. This distance starts at zero and increases at the rate of 18 miles per hour. Thus, in 10 minutes, or 61 hour, they will be 3 miles apart. (61hr×18hrmi=3mi)
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