Question

James has a model helicopter. The model is 8 inches long and 7 inches wide. The actual helicopter is 56 inches long. What is the helicopters actual width, if we assume the models proportions are accurate?

A: 40 inches
B: 49 inches
C: 56 inches
D: 60 inches

Answer 1

49 inches

Explanation:

Write and solve an equation of ratios, as follows:

7 inches x

-------------- = -----------------

8 inches 56 inches

Then (8 ")x = (7 ")(56 "), and

x = 392/8 inches = 49 inches.

The actual width of the helicopter is 49 inches.