measure it
You need to know the length and width of the desk before you can determine the area. Multiply the length by the width to get your answer (length x width = area).
length x width
multiply the width by 2 and then subtract that to the perimeter then divide the answer by 2 to get the length
measure them.
Square root the area. The length and width of a square are always the same and length times width is the area so this is how you get the area.
Given what? Probably measure it
You cannot: given only the volume, there is no way to determine the length, or width or height. If you double the length and halve the width you would still have the same volume.
there is no length or width of a circle. There is radius and circumference and the line that goes all the way through the center to the other side of the circle, which is twice the radius. But there is no length or width of a circle.
An acre is a unit for area. Width x length. You can obtain the 2.54 acre area with a lot of length and width combinations. If you don't know the length, you cannot determine with any certainty what the width will be.
First you measure the width and then the lenght then multiply it. length times width.
I don't think it's possible considering that since there are infinatite numbers, there is no maximum length nor width, making it impossible to find the width of something with only the length
length by width by height