On the right side, both terms contain g, so we can factor it out
T = g(r+vt)
Now, to get g by itself, divide by the things in parentheses
g= T/(r+vt)
I believe that it is C, mind you I could’ve got it wrong. It’s been awhile since I’ve done that kind of math.
The circumference is pi times 5.
So the circumference is 15.7
This is most likely a rectangular prism, C.
Yes 300 is greater and 30 is less then with rounding