Mary is building a sandcastle with rectangular prism molds. One mold is 4 inches long, 6 inches wide, and 2 inches tall. The other mold is 3 inches long, 5 inches wide, and 1 inch tall. If she creates a castle by stacking these molds on top of each other, what volume of sand will be contained in her castle?

The whole castle can hold 63 in² of sand.

Step-by-step explanation:

First, find the volume of the first mold.

V = whl Substitute

V = (6) (2) (4) Multiply

V = 48 in²

Now, find the volume of the second mold.

V = whl Substitute

V = (5) (1) (3) Multiply

V = 15 in²

Add together both volumes to find the volume of the whole castle.

48 + 15 = 63 in²

63 cubic inches

Step-by-step explanation:

You have to first find the volume of each mold:

6 * 4 * 2 = 48 cubic inches

3 * 5 * 1 = 15 cubic inches

Add these two volumes together to find the overall volume of the whole sand castle.

48+15 = 63 cubic inches