buddy wants to pour a concrete slab in his for a basketball court they are going to make two different colored concretes to obtain the result shown in the picture if the entire slab is 15 feet by 30 feet and the key is 10 feet by 15 feet and they are pouring the slab to be 6 inches deep how many cubic yards of each concrete will need to be mixed you need 45 80 pound bags of concrete for each cubic yard of concrete how many bags of concrete do they need