SOLUTION: two buses leave houston at the same time and travel in opposite directions. one bus averages 55mi/h and the other bus averages 45 mi/h. when will they be 400 mi apart?

Question 705603: two buses leave houston at the same time and travel in opposite directions. one bus averages 55mi/h and the other bus averages 45 mi/h. when will they be 400 mi apart?
Found 2 solutions by stanbon, josmiceli:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
two buses leave houston at the same time and travel in opposite directions. one bus averages 55mi/h and the other bus averages 45 mi/h. when will they be 400 mi apart?
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They are separating at the rate of 55+45 = 100 mph
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Time = distance / rate = 400/100 = 4 hrs
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Cheers,
Stan H.
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Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Yhey are moving apart at the sum of their speeds
mi/hr
They will be 400 mi apart in hrs

They will be 400 mi apart in 4 hrs
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