SOLUTION: The model of a car is one tenth of the size of the real car. The model measures 42 cm long. What is the length of the real car. Give your answer in centimetres.

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Question 860118: The model of a car is one tenth of the size of the real car. The model measures 42 cm long. What is the length of the real car. Give your answer in centimetres.
Answer by ben720(159) About Me  (Show Source):
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Algebraic Version


ModelSize+is+1%2F10+realSize

42=1%2F10%2AReal+Size
Multiply both sides by 10
420=Real+Size
The car is 420 centimeters long.

Non-Algebraic Version


If the model car is 1/10 of the real car, then 10 times the model car must be the size of the real car.
Because the model is 42cm, the real car must be 420 centimeters long.