rate of plane --- x km/h
rate of car ------ x-120 km/h
time for plane = 1260/x
time for car = 429/(x-120)
1260/x = 429/(x-120)
cross- multiply ....
1260(x-120) = 429x
carry on
An airplane travels 1260km in the same time a car travels 429km. If the rate of the car is 120kph less than the rate of the airplane, find the rate of each.
1 answer
1 answer