SOLUTION: i know the answer to the word problem i am presenting, what i want to know is, is there a mathematical way of solving it (i used trail and error)? a car travelling at 90 km/h is

Question 823976: i know the answer to the word problem i am presenting, what i want to know is, is there a mathematical way of solving it (i used trail and error)?
a car travelling at 90 km/h is 500 m behind another car travelling at 70km/h in the same direction. how long will it take the 1st car to overtake the second? the answer is 1.5 minutes
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
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relative speed:
90 - 70 = 20 km/hr
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s = d / t
t = d / s
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t = 500 m / (20 km/hr * 1000 m/km * 1/60 hr/min)
t = 1.5 minutes
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