The radius of a semi circle is 3.1 cm then its perimeter is?	Choose the correct option.
A) 15.94 B) 12.41 C) 16.1 D) 32.92 E) 32.3
36/7 r = 6.3 = 15.94   15.94nswer:15.94
<result>A</result>
The radius of a semi circle is 3.1 cm then its perimeter is?