Volume of a cylinder is V=(πr^2)h
I don't know which one of 11m and 3.4m is the radius and the other the height so I'll do it both ways...
V=(π11^2)3.4
Would be 1292.45
V=(π3.4^2)11
Would be 399.48
(If you use a scientific calculator for the problem and not simply 3.14 for Pi instead.)