The perimeter of a semi circle is 144 cm then the radius is?
Options: A) 25 cm B) 28 cm C) 30 cm D) 35 cm E) 40 cm
Explanation:   36/7 r = 144 =&gt; r = 28   ANSWER IS 28 cm
<result>B</result>
The perimeter of a semi circle is 144 cm then the radius is?