zad3
P_b=56\pi
V=112\pi
H=?, r=?
\left \{ {{56\pi=2\pi r*H} \atop {112\pi=\pi r^2*H}} \right.
\left \{ {{H=\frac{56\pi}{2\pi r}} \atop {112= r^2*\frac{28}{ r}}} \right.
\left \{ {{H=\frac{28}{ r}} \atop {112= 28r }} \right.
\left \{ {{H=\frac{28}{ r}} \atop {r=\frac{112}{28} }} \right.
\left \{ {{H=\frac{28}{ 4}} \atop {r=4 }} \right.
\left \{ {{H=7} \atop {r=4 }} \right. | > Odpowiedź