Cars 6

At 9:00 am two cars started from the same town and traveled at a rate of 35 miles per hour and the other car traveled at a rate of 40 miles per hour. After how many hours will the cars be 30 miles apart?

Result

t =  6 h

Solution:

$v_{ 1 } = 35 \ mph \ \\ v_{ 2 } = 40 \ mph \ \\ v = v_{ 2 }- v_{ 1 } = 40- 35 = 5 \ mph \ \\ s = 30 \ m \ \\ t = s/v = 30/5 = 6 = 6 \ \text { h }$

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