A rectangle has a perimeter with linear units, and a surface area with square units. It has no cubic units.
Linear units, like inches, can't be converted to cubic units. If they could, then you'd be able to calculate your height in gallons.
It is: width times length times height measured in cubic units
A rectangle is two dimensional and cannot be cubic, but a three dimensional rectangle ( a rectangular prism ) can be cubic.
Volume is typically measured in cubic units. Common units include cubic centimeters (cm³), cubic meters (m³), liters (L), and milliliters (mL). In the imperial system, volume is often measured in cubic inches, cubic feet, and gallons. The choice of units depends on the context and the size of the object being measured.
The shape in question is not a rectangle but a rectangular prism. Its volume is 12.5*10*8 = 1,000 cubic units.
Linear units, like inches, can't be converted to cubic units. If they could, then you'd be able to calculate your height in gallons.
21*14.5*7.5 = 2283.75 cubic units
Area in square units = base*height
If you mean a width of 5 units then the volume is: 9*5*6 = 270 cubic units
It is: width times length times height measured in cubic units
A rectangle is two dimensional and cannot be cubic, but a three dimensional rectangle ( a rectangular prism ) can be cubic.
This is not a valid conversion. Cubic units is a measure of volume while square units is a measure of area.
Volume in cubic units = pi*radius2*height
Measure its dimension in metric units.
Length x width x depth = cubic volume
The volume of a rectangle is measured in cubic units because it represents the amount of space enclosed within the three-dimensional shape. By measuring in cubic units, we can account for all three dimensions (length, width, and height) of the rectangular prism or solid shape.
Volume is typically measured in cubic units. Common units include cubic centimeters (cm³), cubic meters (m³), liters (L), and milliliters (mL). In the imperial system, volume is often measured in cubic inches, cubic feet, and gallons. The choice of units depends on the context and the size of the object being measured.