The perimeter of a semi circle is 198 cm then the radius is?  Choose the correct choice from the following choices:
A) 22 B) 28 C) 98 D) 38.5 E) 13
36/7 r = 198   =&gt; r   = 38.5   Answer: 38.5
<result>D</result>
The perimeter of a semi circle is 198 cm then the radius is?