Question 1074789
Let n be the speed of the local bus.  Then the express bus would be n+10. So:
240/n-250/(n+10)=1
240n+2400-250n=n²+10n
n²+20n-2400=0
(n+60)(n-40)=0
n=40 or -60
The local bus travels 40 mph; the express bus travels 50 mph. &#9786;&#9786;&#9786;&#9786;