a) fals
b) adevarat
.............................................
At=Al+Ab<=> At=πR(G+R)
Al=πRG
Ab=π[tex] R^{2} [/tex]
V=·[tex] \frac{Ab·h}{3} [/tex]<=> V=[tex] \frac{ R^{2π }· h}{3} [/tex]
V=aria bazei ori inaltime supra 3. adica pi R patrat ori h totul supra trei
