story problem

Question

A circular hot tub with diameter of 15ft sits inside a square platform that measures 20ft on a side to the nearest whole number what is the area of the platform surface around the tub

Answer 1

A square has equal sides all around. Each side of the square is 20 ft.  The radius of the circle is 7.5 ft.

 

We need to find the area of the circle and the area of the square first.

 

Area of square = 20 ft × 20 ft = 400 ft²

 

Area of circle = (7.5)²π = 176.71 ft²

 

 

Since we want the area of the surface around the tub, we subtract the circular area from the square's area.

 

400 ft² - 176.71 ft² = 223.29 ft²