Question

I dont know how to do this

Answer 1

The formula of a surface area of a cylinder:

`S.A.=2\pi r(r+H)`

We have:

`r=1m;\ H=10m`
substitute:

`S.A.=2\pi\cdot1\cdot(1+10)=2\pi\cdot11=22\pi\ m^2\approx22\cdot3.14=69.08\ m^2`