SSC CHSL 6 Mar 2018 Shift 3 Paper

Section: English Language

Question : 22 of 100

Marks: +1, -0

If the perimeter of a semi-circle is 108 cm, then find its radius (in cm).

Solution:

Let radius of semi circle = r cm
⇒ Perimeter of semi circle =

πr + 2r = 108

⇒

r( 22/7 +2) = 108

⇒

r( {22+14 }/7 ) = 108

⇒

r = 108 × 7/36

⇒

r=3×7=21

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