Question

Suppose you are building a model car that is 11 inches long. The actuallength of the car is 177 inches. What is the width of the model car if the actual car is 80inches?

Answer 1

5.0 in

Step-by-step explanation:

We know on a model

11 inches = 177 inches

and we are asked the following question.

? inches = 80 inches

To find the answer, we make use of the ratios.

`(11)/(177)=(?)/(80)`

In other words, the ratio between 11 and 177 must be the same as the ratio between ? (unknown) and 80 inches.

Now multiplying both sides of the above ratio equation by 80 gives

`(11)/(177)*80=(?)/(80)*80`
`(11)/(177)*80=?`

Evaluating the left hand side using a calculator gives

`4.97=?`

or more appropriately

`?=4.97`

rounding the above to the nearest tenth gives

`?=5.0`

This means that the width of the model car is about 5.0 inches if the actual width is 80 inches.