Question

A semicircular window has a diameter of 24 inches. Lou wants to insert a laminated sun-block coating that costs $1.50 per square inch to apply. How much will Lou spend to coat the window with sun-block?

Answer 1

Explanation:

We have,

Diameter of a semicircular window is 24 inches. Radius of window is 12 inches.

Lou wants to insert a laminated sun-block coating that costs $1.50 per square inch to apply.

It means we need to find the area of semicircular window. IT is given by :

`A=(\pi)/(2) r^2`

`A=(3.14* 12^2)/(2)\\\\A=226.08\ inches^2`

Cost per square inch is $1.50. So, Lou spend to coat the window with sun-block is

`A=226.08* 1.5=\$339.12`

So, Lou spend to coat the window with sun-block is $339.12.