Question

a piece of wire is in the form of rectangle whose length and breadth are 35 cm and 31 cm respectively . it is rebent in the form of a circle . Find the radius of the circle​

Answer 1

Answer:

r =21

Step-by-step explanation:

according to given sum,

perimeter of rectangle= circumference of circle

let radius of the circle be r.

=2*(l+b)=2*pie*r

=l+b=pie*r

=35+31=22/7*r

=66=22/7*r

r=21

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Answer 2

Answer: 20.54 cm

Step-by-step explanation:

Length= 35 cm

Breadth= 31 cm

Perimeter of rectangle= 2 (l+b) = 2 (35+31)

= 2x66

=132 cm

Perimeter of the rectangle will be equal to the circumference of the circle.

Hence, circumference of the circle= 132 cm

Circumference= 2πr

= 2 x (22/7) x Radius

Let the radius be r.

2 x (22/7) x r = 132 cm

= 22r/7 = 132/2

= 22r = 66x7

= r = 452/22

= r = 20.54 cm

I hope it helps you.

Thanks.