How to find the length of an edge of a cube
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Math › How to find the length of an edge of a cube
Find the length of an edge of the following cube:
The volume of the cube is 
Explanation
The formula for the volume of a cube is
where 
Plugging in our values, we get:
Our backyard pool holds 10,000 gallons. Its average depth is 4 feet deep and it is 10 feet long. If there are 7.48 gallons in a cubic foot, how wide is the pool?
33 ft
30 ft
7.48 ft
100 ft
133 ft
Explanation
There are 7.48 gallons in cubic foot. Set up a ratio:
1 ft3 / 7.48 gallons = x cubic feet / 10,000 gallons
Pool Volume = 10,000 gallons = 10,000 gallons * (1 ft3/ 7.48 gallons) = 1336.9 ft3
Pool Volume = 4ft x 10 ft x WIDTH = 1336.9 cubic feet
Solve for WIDTH:
4 ft x 10 ft x WIDTH = 1336.9 cubic feet
WIDTH = 1336.9 / (4 x 10) = 33.4 ft
What is the length of an edge of a cube that has a surface area of 54?
Explanation
The surface area of a cube can be determined using the following equation:
Find the length of an edge of the following cube:
The volume of the cube is 
Explanation
The formula for the volume of a cube is
where
Plugging in our values, we get:
Given that the suface area of a cube is 72, find the length of one of its sides.
Explanation
The standard equation for surface area is
where 
A cube has a volume of 64cm3. What is the area of one side of the cube?
16cm2
4cm
4cm2
16cm3
16cm
Explanation
The cube has a volume of 64cm3, making the length of one edge 4cm (4 * 4 * 4 = 64).
So the area of one side is 4 * 4 = 16cm2