Question

1. the length of a car on a scale drawing is 3.25 inches. if the scale drawing has a scale of 1 inch = 4 feet, what is the actual length of the car?

Explanation:

Step1: Set up proportion

Let $x$ be the actual length of the car in feet. We know the scale is 1 inch = 4 feet and the length on the scale - drawing is 3.25 inches. So the proportion is $\frac{1\text{ inch}}{4\text{ feet}}=\frac{3.25\text{ inches}}{x\text{ feet}}$.

Step2: Cross - multiply

Cross - multiplying gives us $1\times x = 4\times3.25$.

Step3: Calculate the value of $x$

$x = 4\times3.25=13$ feet.

Answer:

13 feet