Question

A pieve of wire is bent in the shape of a rectangle whose length and width are 35 cm and 20 cm respectively it is open and rebent to from a circular ring what is diameter of ring

Answer 1

length=35 cm

radius=20cm

so, to find diameter, d= radius*2

ie.20cm*2 = 40cm

Answer 2

Answer:

Length= 35 cm

Breadth= 20cm

Perimeter of the rectangle

= 2(l+b)

=2(35 + 20)

=2*55

=110

Now,

Perimeter of the rectangle= circumference of circle

110= 2 pii r

110= 2 * 22/7 * r

r = (110 * 7)/(2*22)

r= 35/2

r= 17.5 cm

Diameter=2r

=2 * 17.5

= 35 cm