To find the weight of this sand you will use the formula for finding the volume of a cone and then multiply this by 100. The volume will give us the number of cubic feet.
V = 1/3 x B x h (B is the area of the circle)
V = 1/3 x (pi x r^2) x h
1/3 x 3.14 x 3.75^2 x 4.5
V = 66.23 cubic feet
66 cubic feet x 100 = 6600 pounds
The sand weighs approximately 6600 pounds.
