Question 869594
A motorcycle averages a rate of speed 10 mph faster than a car. If the car can travel 90 miles in the same time the motorcycle travels 105 miles, find the rate of each vehicle.
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let x=speed of car
x+10=speed of motorcycle
travel time=distance/speed
...
{{{90/x=105/(x+10)}}}
105x=90x+900
15x=900
x=60
x+10=70
...
speed of car=60 mph
speed of motorcycle=70 mph