Question 784114: Mike is building a shed 24' by 36'. If the concrete slab needs to be 3.5 inches thick, how many cubic yards of concrete does he need to order?
Answer by wilft1(217)   (Show Source):
You can put this solution on YOUR website! L x W x D = volume
24 x 36 x 3.43 = 2963.52 there are 27 cubic feet in a cubic yard, so divide by 27 = 109.76 cubic yards,
i've done concrete for 14 years, in the industry we add .05 to the total to account for low spots. so 109.76 x 1.05 = 115.24
when you order concrete you have to order in whole yards, so round up to the next yard, 116 cubic yards total.
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