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# How many yards of concrete you will need for a 10 foot by 10 foot by 3 inch slab?

Updated: 11/1/2022

Wiki User

13y ago

first we find the surface area of a the slab.

formula for surface area of cuboid( the slab) is = 2(lw+wh+hl)

length= 10 feet= 10/3 yard

width= 10 feet= 10/3 yard

height = 3 inch = 3/12 feet = 1/12 yard

therefore surface area= 2 (10/3 * 10/3 + 10/3*1/12 + 1/12*10/3)

= 2( 100/9 + 10/36 + 10/36)

= 2 (400 + 10 + 10 /36)

= 2 (420/36)

= 420/ 18

~ 23.33 yard square.

Wiki User

13y ago

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Q: How many yards of concrete you will need for a 10 foot by 10 foot by 3 inch slab?
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