Question

Raza unui circular drept este de 5cm,iar generatoarea de 9cm.Sa se afle A|,At si V cilindrului.

Answer 1

Al=2$\pi$RG=90$\pi$
At=Al+2Ab=90$\pi$+2*$\pi R^{2}$=90$\pi$+50$\pi$=140$\pi$
V=$\pi$$R^{2}$G=225$\pi$

Answer 2

Al=2IIRG. Al=90II
At=Al+2×Ab. At=90II+2×IIRpătrat
Ab=140. V=Ab×H. H=G,deci:
V=25II ×9. V=225IIcm