Question

a piece of wire is in the form of a rectangle with dimensions 24cm and 20cm. it is rebent and shaped into a circle. find the radius of the circle

Answer 1

Answer:

r= 14cm

Step-by-step explanation:

perimeter will be same for rectangle and circle. so

24×2+20×2=88cm

2πr= 88

r= 88/2π

r=14 cm

Answer 2

perimeter of rectangle=2(l+b)

=2(24+20)=2(44)

=88cm

the rectangle is bent into the shape of circle

therefore,

circumference of circle=perimeter of rectangle

2πr=88cm

r=88/2π

r=88*7/2*22

r=616/44

therefore, radius of circle r=14cm

It may be useful!