A block of marble is in the shape of a rectangular prism. The block is 8 feet long, 2 feet wide, and 78 inches high. What is the volume of the block?

Length of the block of marble in question is (l) = 8 feet

Width of the block of marble in question is (w) = 2 feet

Height of the block of marble in question is (h) = 78 inches

We already know that

1 inch = 0.08 foot

So

Height of the block of marble in question (h) = 78 * 0.08 foot

= 6.24 feet

Then

Volume of the marble block = i * w * h

= 8 * 2 * 6.24 cubic feet

= 99.84 cubic feet

From the above dduction we can conclude that the volume of the marble block in the shape of a rectangular prism is 99.84 cubic feet.