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If Marty travels 30 miles to work and Jenny travels 20 miles both take the same amount of time to get to work because Marty drives 15 mph faster than Jenny How fast does Jenny drive?
Wiki User
∙ 15y ago
Marty lives one and a half times further away than Jenny, so must travel one and a half times as quickly. 15mph = 1/2 of Jenny's speed, because Jenny is travelling at 2/3 of Martin's speed. Jenny is therefore travelling at 30mph, and Martin is travelling at 45mph.
Wiki User
∙ 15y ago
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