### Home > CC2MN > Chapter 10 > Lesson 10.3.1 > Problem10-70

10-70.

Ellen is building a scale model of the space shuttle. A space shuttle is approximately $122$ feet long and has a wingspan of $78$ feet.

1. How many inches long is the space shuttle?

$1$ foot = $12$ inches

2. Ellen plans to build her model so that $1$ cm on the model represents $10$ inches on the space shuttle. Write a proportion to show this relationship for the length of her model. Find how long will her model be (in centimeters)?

$\frac{1\text{ cm}}{10\text{ inches}}$
$146.4$cm
4. Remember that $1$ inch is approximately equal to $2.54$ cm. How many inches long will her model be?
Multiply your answer from part (b) by this ratio: $\frac{1\ \text{inch}}{2.54\ \text{cm}}$.