answersLogoWhite

0

To calculate the amount of concrete needed for a 20 by 30 slab, first determine the area in square feet: 20 feet × 30 feet = 600 square feet. If the slab is, for example, 4 inches thick, convert the thickness to feet (4 inches ÷ 12 inches/foot = 0.33 feet). The volume in cubic feet is then 600 square feet × 0.33 feet = 198 cubic feet. Finally, convert cubic feet to cubic yards by dividing by 27 (since there are 27 cubic feet in a cubic yard): 198 ÷ 27 ≈ 7.33 cubic yards of concrete needed.

User Avatar

AnswerBot

1mo ago

What else can I help you with?