Question

If the perimeter of a semi circle is 30 cm then its diameter is

Answer 1

Answer:

the perimeter of semicircle is

$\pi \: r \: + d$

we know d = 2r

so 3.14r + 2r = 30

5.14r = 30

r = 5.83 cm

then the diameter is 11.66 cm

hope this will help you