Pi Fraction

Fractions :

A certain part of the whole is called as fractions. The fractions can be denoted as a/b , Where a, b are integers. We can multiply two or more fractions. There are three types of fractions in math,

1) Proper fractions

2) Improper fractions

3) Mixed fractions

Pi( pi  ):

We can express pi as an improper fraction.

pi  = 22 / 7

Here we are going to see some problems using pi fraction .


Example Problems for Pi Fraction

Problem 1:

Find the area of the circle with the radius of 5 cm. using the area formula πr2. (Note: Here substitute the fraction value for π =(22/7)

Solution:

Given radius of the circle is 5 cm.

Formula:

Area of the circle  = πr2

Substitute the given radius value and π in the given formula, we get

Area of the circle = (22/7) * (52) cm2

= 3.14 * 25 cm2

Multiplying the both the values, we get

=  78.5 cm2

Answer: The area of the circle is 78.5 cm2

Problem 2:

Find the surface area of the sphere with the radius of 12 cm. using the area formula 4πr2. (Note: Here substitute the fraction value for π =(22/7) )

Solution:

Given radius of the sphere is 12 cm.

Formula:

Surface area of the sphere = 4πr2

Substitute the given radius value and π in the given formula, we get

Surface area of the sphere = 4 * (22/7) * (122) cm2

= 4 *  3.14 * 144 cm2

Multiplying the both the values, we get

= 1808.64 cm2

Answer:

The surface area of the sphere is 1808.64 cm2

My forthcoming post is on Geometry Calculator will give you more understanding about Algebra.

Practice Problems for Pi Fraction

Practice problem 1:

Find the area of the given circle has the radius length is 7m. (Note: Here substitute the fraction value for π =(22/7) ).

Answer:

The area of the circle is 154 m2

Practice problem 2:

Find the surface area of the given sphere has the radius length is 21m. (Note: Here substitute the fraction value for π = (22/7) ).

Answer:

The area of the circle is 5544 m2