Find the volume of the sphere, considering pi equal to 3.14, if its surface has an area of 615.44 dm2.

To solve this problem, you need to find the volume of the ball. To do this, recall the formula for the volume of a ball;

Ball volume formula:

V = 4/3 * P * R ^ 3, where V is the volume of the ball, P is the “PI” number equal to 3.14, R is the radius of the ball;

However, we do not know the radius to find the volume. Find the radius of the ball through its surface area;

Surface area formula:

S = 4 * P * R ^ 2;

From this formula, we find the radius of the ball:

R = √S / 4 * P;

Let’s substitute the data and calculate;

R = √615.44 / 4 * 3.14 = √615.44 / 12.56 = √49 = 7dm.

Let’s find the volume of the ball:

V = 4/3 * 3.14 * 73 = 1436.03 dm3.



One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.