UP Police Constable Exam Model Paper 4

Question : 97 of 150

Marks: +1, -0

If the radius of a circle made of wire is 14 cm is remolded in the shape of a square, then find the side of the square.

14 cm
7 cm
22 cm
11 cm

Solution:

Given :
Radius of circle = 14 cm
Concept used :
Perimeter of circle = Perimeter of square
Formula used :
Perimeter of circle = 2

\π \r

unit
Perimeter of square = 4a unit
Solution :
Let the side of the square be a
⇒ 4 × a = 2 × (22/7) × 14
⇒ 4 × a = 2 × 22 × 2
⇒ a = 22 cm
∴ The side of the square is 22 cm

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