Question

A sphere has a diameter of 22 units. What are its radius and volume?

Answer 1

Answer: D. The radius is 11 units, and the volume is 5,572.45 cubic units.

Step-by-step explanation:

Given: The diameter of sphere (d)= 22 units

Then the radius of the sphere is given by :-

$r=\dfrac{d}{2}\\\\\Rightarrow\ r=\dfrac{22}{2}\\\\\Rightarrow\ r=11\text{ units}$

We know that the volume of a sphere is given by :-

$V=\dfrac{4}{3}\pi r^3$, where r is the radius of sphere.

$\Rightarrow\ V=\dfrac{4}{3}(3.14) (11)^3=5572.45333333\approx5572.45\text{ cubic units]$

Answer 2

Its a or d because the radius is half the diameter