Can you please help me out with a question

Question

asked Sep 7, 2023 103k views

1 Answer

CountZero · Answer 1 · 2023-09-13T17:43:46+0000

So, the surface area of a sphere is

$A\text{ = 4}\pi r^2$

so, you have the value of A, and the value of pi, now you want to resolve for r

$615.752\operatorname{mm}^2\text{ = }4\pi r^2$
$\sqrt[]{(\frac{615.752\operatorname{mm}}{4\cdot\pi})}\text{ = r}$

Then, r = 6.9999999mm... and the ask you to approximate to a whole number

the answer is r = 7mm