Respuesta :
The sphere has only one dimension
It is its radius
Then the rule of its volume is
[tex]V=\frac{4}{3}\pi r^3[/tex]The rule of its surface area is
[tex]A=4\pi r^2[/tex]Let the radius of the sphere is 21 cm
r = 21 cm
Substitute it in the rule of the volume to find it
Use pi = 22/7
[tex]\begin{gathered} V=\frac{4}{3}\times\frac{22}{7}\times(21)^3 \\ \\ V=38808\text{ cm}^3 \end{gathered}[/tex]Substitute r by 21 in the rule of the area to find it
[tex]\begin{gathered} A=4\times\frac{22}{7}\times(21)^2 \\ A=5544\text{ cm}^2 \end{gathered}[/tex]The volume of the sphere which has a radius of 21 cm is 38808 cubic cm
The surface area of the sphere with same radius is 5544 square cm
