A general formula for the volume of a container is V = length x width x height (other words may be used in place of the three given).
3. 900 in^3, the fourth option
V = 20 x 15 x 3
V = 900 in^3
4. 288 in^3, the third option
V = 6 x 6 x 8
V = 288 in^3
Hope this helps!! :)
The distance from the outside edge of a circle to its centre is given by its radius. The circumference of a circle is given by 2πr, thus if we know that this is equal to 75 feet and using π = 3.14, we get:
75 = 2*3.14*r
r = 11.942
Thus r = 12 ft (to the nearest foot)