Question

Please finish this equation and write the answer​

Answer 1

Given:

The equation is:

`2540=(22)/(7)r^2(20)`

To find:

The solution for the given equation.

Solution:

We have,

`2540=(22)/(7)r^2(20)`

It can be written as:

`(2540* 7)/(22* 20)=r^2`

`(17780)/(440)=r^2`

`(889)/(22)=r^2`

Taking square root on both sides, we get

`\sqrt{(889)/(22)}=r` [Radius cannot be negative]

`r=6.3568145`

`r\approx 6.36`

Therefore, the value of r is about 6.36 cm.