Math11
posted by Sari .
A model airplane is made on a scale of 1:128.
A)What is the scale factor of the model?
B)If the airplane has a wingspan of 30 cm, what is the wingspan of the actual airplane
Need help on this.

A)
1 / 128
B )
30 * 128 = 3840 cm = 38.4 m
Remark:
1 m = 100 cm
3840 cm / 100 cm = 38.4 m