Question

A scale model of an airplane has a length of 19 centimeters and a wingspan of 18 centimeters. The length of the real airplane is 38 meters. What is the wingspan of the real airplane? Enter your answer in the box.

Answer 1

The wingspan of the real airplane is 36 meters.

Explanation

In the scale model, length of the airplane is 19 centimeters and wingspan is 18 centimeters. So, the ratio of length of airplane to the length of wingspan will be $19: 18$

Now , the length of the real airplane is 38 meters and lets assume, the length of real wingspan is $x$ meter

Thus the ratio will be...

$38:x = 19:18 \\ \\ \frac{38}{x} =\frac{19}{18}\\ \\ 19x=(38*18)\\ \\ x= \frac{38*18}{19} = 2*18=36$

So, the wingspan of the real airplane is 36 meters.

Answer 2

If the length of the real airplane is 38 then 19x2 is 38, so 18x2 36. therefore you answer is 36