Question

3) If the perimeter of a closed semicircle is 72m.Find its diameter.​

Answer 1

Answer:

diameter = 45.8m

Step-by-step explanation:

Perimeter of a circle = 2$\pi$r

Perimeter of a semi circle = $\pi$r

=> $\pi$r = 72m

We know that $\pi$ = 3.14

∴ r = 72/3.14

r = 22.9

diameter = 2r = 2 × 22.9

= 45.8m

Answer 2

diameter = 45.8m

Step-by-step explanation:

Perimeter of a circle = 2π r

Perimeter of a semi circle = π r

=> π r = 72m

We know that π = 3.14

∴ r = 72/3.14

r = 22.9

diameter = 2r = 2 × 22.9

= 45.8m

Hope its helps you !!