Question

Help please. It’s geometry and it asks to find the shaded region.

Answer 1

Answer: (a)

Explanation:

Given

The diameter of the inner circle is
`d=14\ m`

thickness of the strip is
`t=2\ m`

So, the radius of inner circle is
`r=7\ m`

Radius of the outer circle
`R=7+2=9\ m`

Area of the shaded region is the difference of the area of outer circle and inner circle.

`\Rightarrow \pi R^2-\pi r^2\\\Rightarrow \pi (9^2-7^2)\\\Rightarrow 3.142* 32\\\Rightarrow 100.5\ m^2`

hence, option (a) is correct.