SOLUTION: the ratio of lengths on a model car to the lengths on the actual car is 1.15.A tyre on the model car is 3cm in diameter. what is the diameter of the actual tyre

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Question 849317: the ratio of lengths on a model car to the lengths on the actual car is 1.15.A tyre on the model car is 3cm in diameter. what is the diameter of the actual tyre
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
Notation is important. Do you want to express the ratio as 1.15, or as 1:15? These are unequal. The ratio is as, Model:Actual, ratio of model length to actual length. This is judged to be the 1:15 based on the small size of 3 CENTIMETERS for the model's diameter.

You want this proportion:
3%2Fu=1%2F15 using u as the actual diameter of the wheel in cm, and is unknown but solvable.