Examples on Cube Root of 81
Example 1: Simplify ∛(81) × ∛(-81)
Solution:
We know,
∛(81) = 4.3267
∛(-81) = -4.3267
Hence, ∛(81) × ∛(-81) = 4.3267 × (-4.3267)
Example 2: Given the volume of a cube is 81 inches3. Find the length of the side of the cube.
Solution
Volume of the Cube = 81 inches 3 = a3
a3 = 81
a = ∛81 inches
The side length of the cube is 4.33 inches since the cube root of 81 is 4.33.
Cube Root of 81
Cube Root of 81 is approximately equal to 4.326. As 81 is not a perfect cube, it cannot be expressed as the cube of an integer. Cube Root of 81 can be represented as ∛81 or 3∛3 or 34/3.
In this article, we will learn to find the cube root of 81 by various methods and some solved examples related to the same.