if the number of square centimetire on the surface of a sphear is equal to the number of cubic centimetres in its volume what is the diameter of the sphere​

Respuesta :

Answer:

The diameter of the sphere is 6 centimeters

Step-by-step explanation:

we know that

The surface area of a sphere is

[tex]SA=4\pi r^{2}[/tex]

The volume of the sphere is

[tex]V=\frac{4}{3}\pi r^{3}[/tex]

Equate both formulas

[tex]\frac{4}{3}\pi r^{3}=4\pi r^{2}[/tex]

Simplify

[tex]\frac{1}{3}r^{3}=r^{2}[/tex]

[tex]\frac{r^3}{r^2}=3[/tex]

[tex]r=3\ cm[/tex]

Remember that the diameter is two times the radius

so

[tex]D=2r=2(3)=6\ cm[/tex]

therefore

The diameter of the sphere is 6 centimeters