Question

The total surface area of the larger bin is 471.3 square feet. What is the surface area of the smaller bin?

589.1 square feet

301.6 square feet

377.04 square feet

241.3 square feet

Answer 1

To answer this question, you must recognize the relation between the units of length and the units of surface area. The units of surface area are (length)^2. Thus, in order to find the surface area of the smaller one, you simply take the surface area of the larger one, and multiply it by the squared ratio of the radius of the larger one to the smaller one. mathematically, it looks like this:\[Surface(s)=surface(L)*(4/5)^2\]
Thus, you will find that the smaller surface area is equal to 301.6 sq. ft.

Answer 2

sorry, typo there - multiply the surface of the larger one by the squared ratio of the radius of the smaller one to the larger one.