[tex] \frac{h}{R} =1.6= \frac{16}{10} \\ h=G= \frac{16R}{10} \\ Al=80 \pi =2 \pi RG \\ 80 \pi =2 \pi \frac{16 R*R}{10} \\ 16 R^{2} =80*5 \\ R^2=25 \\ R=5 \\ G= \frac{16*5}{10} =8=h \\
At=Al+2Ab \\ Ab=2R*G=2*5*8=80 \\ At=80 \pi +2*80=80( \pi +2) \\ V= \pi R^{2} h=25*8=200
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