Question

A piece of wire in the shape of a recttangle of length 7cm and breadth4cm is refolded in the form of a circle.find the radius of the circle?​

Answer 1

Answer:

Radius=3.5cm

Step-by-step explanation:

Perimeter of rectangle =2(l+b)

=2(7+4)

=2(11)

=22cm

Curumference of circle=area of rectangle

Circumference =2×22/7×r

22cm. =44/7×r

R=22×7/44

R=3.5cm

Answer 2

Length of rectangle = 7 cm

Breadth of rectangle = 4 cm

Perimeter of rectangle = circumference of circle

2(l+b)=2πr

11cm=( 22 /7 ×r)cm

r=  11×7 /22=7/2cm

r=3.5cm