Question

The perimeter of a semi circle is 36 cm. What is the radius of the semi circle?

Answer 1

Answer:

Perimeter = 36

πr = 36

r = 36×7/22

r = 11.45 cm

Answer 2

⇒πr+2r = 36

⇒r( 22/7 + 2)=36

⇒ 36/7 × r =36

⇒r = 7

∴ Diameter 2r = 2 × 7 = 14cm