cos\alpha=\frac{r}{100}
0,28=\frac{r}{100}
r=0,28* 100=28
h^2+r^2=100^2
h^2+28^2=10000
h=\sqrt{10000-784}=\sqrt{9216}=96
P_{pb}=\pi rl=\pi *28* 100=2800\pi
V=\frac{1}{3}* \pi r^2h=\frac{1}{3}* \pi *784*32=25088\pi