Contents
In this publication, we will look at how you can calculate the radius of a ball and analyze examples of solving problems for fixing the material.
Formulas for calculating the radius of a ball
1. Через объем
Радиус шара вычисляется по формуле:
V – объем шара; равен трем четвертым произведения его радиуса в кубе и числа π.
π – a number whose approximate value is 3,14.
2. Through surface area
The radius of the ball is calculated as follows:
S is the surface area of the sphere; is equal to four of its radii squared multiplied by the number π.
S = 4πR2
Examples of tasks
Task 1
The volume of the ball is 904,32 cm3. Find its radius.
Decision:
Using the first formula, we get:
Task 2
Вычислите радиус шара, если площадь его поверхности равна 314 см2.
Decision:
In this case, you can calculate the radius of the ball by applying the 2nd formula (through the surface area):
