Question

two cars 270 mi. apart enter an interstate highway traveling towards one another. one car travels at 65 mph and the other at 55 mph. when will they meet
no idea. when did they start?

However, if you want to know how long it took them to meet, that would be
time = distance/speed = 270/(65+55) = ? hours
r1*t + r2*t = 270.
65*t + 55*t = 270,
t = ?

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