SOLUTION: When a car reduces it speed by 18km/h, its wheels is 200cm in circumference, take 1 sec longer to make revolutions. What was the car's original speed? quadratic equation for thi

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Question 106156: When a car reduces it speed by 18km/h, its wheels is 200cm in circumference, take 1 sec longer to make revolutions. What was the car's original speed?
quadratic equation for this ??
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
When a car reduces it speed by 18 km/h, it's wheel is 200 cm in circumference, takes 1 sec longer to make a revolution. What was the car's original speed?
:
There is problem here. 200 cm is 2 meters, if it took 1 sec per revolution that would be only %28%282%2A3600%29%29%2F1000 7.2 km/hr, How could you reduce the speed 18 km/h?