Question

Sunita creates a scale model of an aeroplane. The scale of the model is 4 cm to 13 m. Sunita's model has a wingspan of 21 cm. What is the wingspan of the real aeroplane?

A) 68 m
B) 84 m
C) 52 m
D) 65 m

Answer 1

The wingspan of the real aeroplane is 68 meters.

Step-by-step explanation:

To find the wingspan of the real aeroplane, we need to use the scale factor given. The scale of the model is 4 cm to 13 m, which means that 4 cm represents 13 m. Since we know the wingspan of the model is 21 cm, we can set up the following proportion:

4 cm / 13 m = 21 cm / x m

Cross multiplying, we get:

4 cm * x m = 13 m * 21 cm

Now, solving for x, we find that the wingspan of the real aeroplane is 68 meters.