Răspuns :
g=generatoarea sau inaltimea
V=πr²g
160π=π×4²×g
160=16g
g=10 cm
At=Al+2Ab=2πrg+2πr²=2×π×4×10+2×π×4²=80π+32π=112π cm²
V=πr²g
160π=π×4²×g
160=16g
g=10 cm
At=Al+2Ab=2πrg+2πr²=2×π×4×10+2×π×4²=80π+32π=112π cm²