Pls show all your working out and the correct answer will recieve brainliest

So the length is 4*28=112mm
The width would be calculated like this:

you draw an equilateral triangle in the middle with sides or 2r(56mm). The based on pythagorean theorem u know that
h=rad(56^2-28^2)=48.497
28+28+h=104.497

The area would be S=l*w which is 11703.7113mm

2 out of 6 marbles are gray.
2/6 simplified is 1/3.

the correct answer is that you have 1/3 chance of picking a gray marble.

hope this helps:))