Time

YELLA

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Feb 28, 2011
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An express bus travels 320 miles in the same amount of time that a car travels 280 miles. The rate of the car is 8mph less than the rate of the bus. Find the rate of the bus
 

galactus

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Note the problem says their times are the same.

So, since d=rt, then t=d/r

So, we equate these.

\(\displaystyle \frac{320}{r}=\frac{280}{r-8}\)

EDIT:

LaTex is not working.

So, we have:

320/r=280/(r-8)

solve for r.
 
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