Question

In a scale drawing a plane has a length of 35 centimeters. The actual length of the plane is 87.5 feet. What is the scale of the drawing?

Answer 1

If 35 cm  represent the length of the plane which is 87.5 ft of the actual plane length. let 1 cm be x ft. 
35 cm = 87.5 ft
1 cm = x ft
cross multiply this and the answer is 2.5 ft. Therefore, the scale drawing is 1 cm is 2.5 ft.