Question

Un con circular drept are R= 16cm si Al - 320\pi . Calculati :

a) G b)h c) V

Answer 1

[tex]A_l=\pi{R}{G}\;\;inlocuim\,...\,\;320\pi\,=\,\pi\cdot16\cdot{G}\;\Rightarrow\;G=\frac{320\pi}{16\pi}=20(cm)\;;\\ \\ h=\sqrt{G^2-R^2}=\sqrt{400-256}=12(cm)\;;\\ \\ V=\frac{\pi\cdot{R^2}\cdot{h}}{3}=\frac{256\cdot12\cdot\pi}{3}=1024\pi(cm^3)[/tex]