1 Answer

Cool Guy Yo · Answer 1 · 2022-12-29T02:08:48+0000

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.

Please log in or register to add a comment.