Math Expression: Volume of a Sphere Practice Question

Given a sphere with the radius 7cm. Find the volume of this sphere. Take π as 3.14.

Step 1

The picture below shows the sphere with the radius 7cm.
Step 2

To calculate the volume, we can use the formula for the volume of a sphere. Note that r is the radius of the sphere.
Step 3

Since the values for r, and π are given, we can substitute r with 5 and π with 3.14. After substituting these values, we can calculate V as shown below:
Step 4

Now, the calculated number 1436.03 carries no meaning unless we include the unit for it. Since the radius is in cm, the unit for volume will be cm³. Hence:

V = 1436.03 cm³
Step 5

Clearly, the answer is B.