SOLUTION: i need the formula to use to see what is a car's speed in kilometers per hour if a 90-kilometer trip took 3 hours

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Question 226693: i need the formula to use to see what is a car's speed in kilometers per hour if a 90-kilometer trip took 3 hours
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
D=tr
r=D/t
r=90/3
r=30 kph