Question 1065407
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Ben starts walking along a path at 2 mi/h. One and a half hours after Ben leaves, his sister Amanda begins jogging along 
the same path at 4 mi/h. How long will it be before Amanda catches up to Ben ? 
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When Amanda started jogging, Ben just was 1.5 hours * 2 mi/h = 3 miles ahead.


Starting from this moment, the distance between them decreases in (4 mi/h - 2 mi/h) = 2 mi/h every hour.


Hence, Amanda will catch up to Ben in {{{3/2}}} = 1.5 hours.
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You can solve this problem by any of these two methods.


They both are correct.