Question

A piece of wire in the form of of a rectangle 18cm long and 15cm broad is bent and reshaped as a circle. Find the radius of the circl.

Answer 1

Step-by-step explanation:

perimeter of rectangle

= 2(L+B)

= 2(18+15)

=2(33)= 66cm

Now it's bent the perimeter becomes the

boundry of the circle i.e, the circumference.

circumference= 66

2πr = 66

2 x 22/7 x r = 66

44/7 x r = 66

r = (66x7)/22 = 462/22

radius=21cm

Answer 2

Hi I am Mithuun

perimeter of rectangle = Circumference of circle

perimeter of rectangle = 2 ( l + b ) = 2 ( 18+15 ) = 2 × 33 = 66cm

Circumference of circle = 2 × 22/7 × r

66 = 44/7 ×r

462/7 = r

r = 21 cm

Answer: Radius = 21 cm