Use this information to solve: Water weighs about 63 pounds...

Use this information to solve: Water weighs about 63 pounds per cubic foot, and a cubic foot of water is about 7.5 gallons.
A king-size waterbed mattress measures 5.5 feet by 6.5 feet by 8 inches deep. To the nearest pound, how much does the water in this waterbed weigh?

Labs

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

Key Concepts

Rounding

Rounding involves approximating a number to a specified degree of accuracy, such as to the nearest whole number. This technique simplifies the final answer while maintaining a result that is acceptably close to the precise value.

Density

Density is a measure of mass or weight per unit volume. When the density of a substance is known, such as water weighing 63 pounds per cubic foot, it can be used to determine the total weight of a given volume by multiplying the volume by the density.

Unit Conversion

Unit conversion is the process of converting measurements from one unit to another to maintain consistency in calculations. In scenarios involving different units (such as inches to feet), converting all dimensions to the same unit is essential for accurate volume or weight calculations.

Volume Calculation

Volume calculation involves finding the space occupied by an object by multiplying its dimensions. For rectangular prisms, the volume is obtained by multiplying the length, width, and height, ensuring that all measurements are in consistent units.

Transcript

Please give Ace some feedback