RRB Assistant Loco Pilot and Technician Model Paper 1 with solutions

Question : 23 of 100

Marks: +1, -0

A copper wire is bent in the form of square with an area of 121

\cm^2

. It the same wire is bent in the form of a circle, the radius (in cum) of the circle is
(Take π = 22 7 )

Solution:

(a) Side of square =

√121

= 11 cm
∴ Length of wire = 4 × 11 = 44 cm
∴ 2πr = 44
⇒ 2 ×

22/7

× r = 44
⇒ r =

{44×7}/{22×2}

= 7 cm

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