Is this right sue??

the radii is 35mm so the circumference = 22.0 mm

Yes. I get 21.98 mm which rounded up is 22.0 mm.

the radii is 35mm so the circumference = 22.0 mm

Perhaps there is a typo somewhere.

The previous post said that the radius was 3.5 mm.

I agree that she was most probably working with 3.5 but missed out the decimal point when repeating the problem.

No, that is not correct. The formula for the circumference of a circle is given by C = 2πr, where C is the circumference and r is the radius. To calculate the circumference, you need to multiply the radius by 2π.

In this case, you mentioned that the radius is 35mm. So, the correct calculation would be:

Circumference = 2π × radius
Circumference = 2π × 35
Circumference ≈ 2 × 3.14 × 35
Circumference ≈ 219.8 mm

Therefore, the correct answer is approximately 219.8 mm, not 22.0 mm.