SOLUTION: An airplane travels 1260 km in the same time a car travels 420 km. If the rate of the car is 120 kph less than the rate of the airplane, find the rate of each?
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Question 928403: An airplane travels 1260 km in the same time a car travels 420 km. If the rate of the car is 120 kph less than the rate of the airplane, find the rate of each?
You can put this solution on YOUR website! x = speed of airplane
y = speed of car
y = x - 120
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s = d/t
t = d/s
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airplane:
t = 1260/x
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car:
t = 420/y
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1260/x = 420/y
1260y = 420x
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put the system of linear equations into standard form
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y = x - 120
1260y = 420x
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x - y = 120
420x - 1260y = 0
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copy and paste the above standard form linear equations in to this solver:
https://sooeet.com/math/system-of-linear-equations-solver.php
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solution:
x = speed of airplane = 180 kph
y = speed of car = 60 kph
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