Question

A circular table cloth has a hem all the way around its perimiter. The length of this hem is 454cm. What is the radius of the table cloth?

Answer 1

Answer: radius is 72.228cm

Explanation:

Perimeter of a circle = 2 x pi x r

Where pi is a mathematical constant of 3.1428

Perimeter = 454cm,

Radius is unknown, let radius be r

Slot the values into the formula

454cm = 2 x 3.1428 x r

454 = 6.2856r

Divide both sides by 6.2856 to get ghe value of r

r = 454/6.2856

r = 72.228cm

Answer 2

Radius of the circular cloth =72.29 cm

Explanation:

The perimeter of a circle is the length of its boundary.

The circular table cloth has a hem around its boundaries that have a length of 454 cm.

So,

Perimeter of the circular cloth=
`2*\pi *r`

`454=2*\pi *r`

As,
`\pi =(22)/(7) =3.14`

So,

`454=2*3.14*r\\\\454=6.28*r\\\\r=454/6.28\\\\r=72.29cm`

The radius of the circular cloth is 72.29 cm