SOLUTION: How long does it take an automobile traveling in the left lane at 84.2 km/h to overtake another car that is traveling in the right lane at 37.1 km/h, when the cars' front bumpers a

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Question 346851: How long does it take an automobile traveling in the left lane at 84.2 km/h to overtake another car that is traveling in the right lane at 37.1 km/h, when the cars' front bumpers are initially 121 m apart?
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Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
the rate of closure is 47.1 km/h (84.2 - 37.1)

there are 1000 m in a km , and 3600 sec in an hr

47.1 * 1000 / 3600 = rate of closure in m/s ___ divide this into 121 to find the time in seconds