Correct option A) 100.48m .
Step-by-step explanation:
Here we have , Diameter of a semicircle is 64 meters . We need to find the perimeter of semicircle . Let's find out:
We know that perimeter of a circle = [tex]2\pi r[/tex] , where r is radius of circle .
⇒ [tex]Perimeter = 2\pi r[/tex]
⇒ [tex]Perimeter = 2\pi \frac{D}{2}[/tex] , where D is diameter of a circle .
Since, a semicircle is half of a circle so Perimeter of semicircle will also be half of circle i.e.
⇒ [tex]Perimeter = \frac{2\pi \frac{D}{2}}{2}[/tex]
⇒ [tex]Perimeter = \pi \frac{D}{2}}[/tex]
Diameter = 64 meters
⇒ [tex]Perimeter = (3.14) \frac{64}{2}}[/tex]
⇒ [tex]Perimeter = (3.14) 32[/tex]
⇒ [tex]Perimeter = 100.48 m[/tex]
Therefore , Perimeter of semicircle is 100.48 m . Correct option A) 100.48m .
