First one
Volume = (1/3) pi r^2 * h = (1/3) pi (3^2) * 9 = 81 pi cm^3
Surface area = pi *r * l + pi * r^2
Note that l = √[3^2 + 9^2] = √90 = 3√10
So we have
Surface area = pi * r [ l + r] = pi * 3 * [ 3√10 + 3] = pi * 3 * 3 [ √10 + 1] = 9 [ √10 + 1] pi cm^3
