Well firstly, you need to change everything into 1 type of unit. Either you can have everything in feet or everything in inches.
In this example, since 2 of the 3 units are already in feet, I'll change the 3rd one into feet as well.
In 1 foot, there are 12 inches.
So to find out how many feet there are in 9 inches, just do 9 divided by 12 which equals 0.75ft
Now, to finish it off just simply do 120ft x 240ft x 0.75ft and you get an answer of 21600ft3
NOTE: Remember that the units will be ft3 as this is a measurement for volume.
Hope that helps.
Jamz159
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10' x 12' = 120ft² 1yd² = 3ft x 3ft = 9ft² 120ft² / 9 ft² = 13.33yd²
1 yard = 3 feet. Volume = 240 x 1 = 240ft^3 Conversion Factor = 3 240ft^3/3^3 = 8.8yd^3 --> 8.8 Cubic Yards
120ft^2 , 10ft * 12ft
6,000 square feet. Multiply length by width - the result is the area in square feet.
There are 12 inches in one foot, so in 120 feet there would be 12 x 120 inches, which is 1440 inches.