Question 678699
one car travels 20 mph faster than another.
 while one of them travels at 240 miles the other travels 180 miles.
 find each of their speeds
:
let s = speed of the slower car
then
(s+20) = speed of the faster
:
write a time equation; time = dist/speed
:
{{{240/((s+20))}}} = {{{180/s}}}
cross multiply
240s = 180(s+20)
240s = 180s + 3600
240s - 180s = 3600
60s = 3600
s = 3600/60
s = 60 mph the slower car
:
You can find the speed of the faster car, check to see if their times are equal