So you got to do 2.5×1.6 and there you got 4. than you do 4×1000 and the answer is 4 000 meters :)
I think it's 5040, that's what I got when I put it in my calculator
The common factors are 2,4,5,10,20
The surface area equation of a cylinder is:
2 * pi * r^2 + 2 * pi * r * h
Plug the values in:
2 * pi * 10^2 + 2 * pi * 10 * 10 is about 1256.64 units squared.
