Depends how wide the 3 yard length is and how deep the concrete is put over that area.
You need 82/3 [cubic] yards for every foot deep that it has to be.
2.407 cubic yards for every 3 inches of depth.
How many square yards in a 20x18 feet 3 inches thick
55.56 cubic yards.
1.62
How mush is a price of 5 yards of concrete delievered
50/3 cubic yds of concrete
2.2 Yards
One cubic yard.
2.407 cubic yards for every 3 inches of depth.
You need 82/3 [cubic] yards for every foot deep that it has to be.
One square yard is nine square feet, so 27 square feet is equivalent to 3 square yards. So 3 yards of concrete will cover 27 square feet.
How many square yards in a 20x18 feet 3 inches thick
331/3 cubic yards for each foot of thickness. 27/9 cubic yards for each inch of thickness.
55.56 cubic yards.
1.62
16 ft * 47 ft * 4 inches =16/3 yards * 47/3 yards * 4/36 yards = 9.3 yards approx.