Question

The radius of a sphere is 3 cm. What is the sphere's volume? A) 37.7 cm3 B) 105.9 cm3 C) 113.1 cm3 D) 254.3 cm3

Answer 1

Answer:

C) 113.1 cm3

Step-by-step explanation:

Radius of sphere is given to be 3 cm. So, r = 3 cm

The volume of a sphere can be calculated as:

$Volume =\frac{4}{3} \pi r^{3}$

Using the value of r in the above formula we get:

$Volume=\frac{4}{3} \pi (3)^{3}\\\\ Volume = \frac{4}{3} \pi \times 27\\\\ Volume = 113.1$

Thus, the volume of the sphere with radius 3 cm is 113.1 cm cube.

Answer 2

Answer: Option C.

Step-by-step explanation:

You need to use the formula for calculate the volume of a sphere:

$V_{sphere}=\frac{4}{3}\pi r^3$

Where the radius of the sphere is "r".

You know that the radius of this sphere is 3 centimeters.

Therefore, you need to substitute $r=3cm$ into the formula  $V_{sphere}=\frac{4}{3}\pi r^3$ to find the volume of this sphere.

Then, the volume of the sphere is:

$V_{sphere}=\frac{4}{3}\pi (3cm)^3\\\\V_{sphere}=113.1cm^3$