SOLUTION: two cars start from the same place at the same time but in opposite directions. Their speeds are 80km/hr and 65km/hr. After how long will they be 580 km apart.

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Question 907747: two cars start from the same place at the same time but in opposite directions. Their speeds are 80km/hr and 65km/hr. After how long will they be 580 km apart.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
D = rt
80*t + 65t = 580mi
t = 580/145 = 4hrs