SOLUTION: Car A is travelling along a freeway at 100km/h when it is passed by car B. If both cars maintain a constant speed and the end of the freeway is 10km away, find the speed at which c

Question 1172905: Car A is travelling along a freeway at 100km/h when it is passed by car B. If both cars maintain a constant speed and the end of the freeway is 10km away, find the speed at which car B must travel to beat car A to the end of the freeway by 1 minute?
Answer by ikleyn(52794) (Show Source): You can put this solution on YOUR website!
.


Car A spends   =  of an hour = 6  minute to get the finish.


Hence, car B must reach the finish in 5 minutes  (5 = 6 - 1).


It means that car B must move at the speed of   = 2 kilometers per minute, or 120 km/h.    ANSWER

Solved (mentally).

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