Question 644381
Let t = time


First bus:


d = rt


d =  80t


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Second Bus:


d = rt


d = 90(t-1.5)


Add up the two distances that the buses travel, set that equal to 460, then solve for t to get


80t + 90(t - 1.5) = 460


80t + 90t - 135 = 460


170t - 135 = 460


170t = 460 + 135


170t = 595


t = 595/170


t = 3.5


So it will take <font color="red">3.5 hours (3 and a half hours, or, 3 hours and 30 minutes)</font>


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