SSC CHSL 7 Mar 2018 Shift 2 Paper

Section: English Language

Question : 22 of 100

Marks: +1, -0

If the perimeter of a semi-circle is 36 cm, then find its radius (in cm).

Solution:

Let radius of semi circle =

r

cm
⇒ Perimeter of semi circle =

πr + 2r = 36

⇒

r( 22 /7 +2) = 36

⇒

r( {22+14}/7 ) = 36

⇒

r = 36 × 7/36

⇒

r=1×7=7

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