Question

a block of marble is in the shape of a rectangular prism. the block is 6 feet long, 5 feet wide, and 90 inches high. what is the volume of the block?
the volume of the block is 　　 cubic feet.

Explanation:

Step1: Convert height to feet

Since 1 foot = 12 inches, convert 90 inches to feet: $90\div12 = 7.5$ feet.

Step2: Use volume formula for rectangular prism

The volume \( V \) of a rectangular prism is \( V = l\times w\times h \), where \( l = 6 \) ft, \( w = 5 \) ft, \( h = 7.5 \) ft.
So \( V = 6\times5\times7.5 \).

Step3: Calculate the volume

\( 6\times5 = 30 \), then \( 30\times7.5 = 225 \).

Answer:

225