Question 353612
At 9am Rob leaves his house traveling 60mph, Sue leaves the same house 15minutes later traveling 65mph.  At what time will Sue catch up to Rob?
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In 15 mins, Rob is 15 miles away.
Sue's speed relative to Rob is 5 mph (65-60)
15 miles/5 mph = 3 hours
9:15 + 3 = 12:15 PM