A roof that encloses an attic is a square pyramid with a base edge length of 45 feet and a height of 5 feet. What is the volume of the attic in cubic feet and in cubic yards? (Hint: 27 cubic feet = 1 cubic yard.)

Question

jdoe0001 · Answer

|dw:1404603700017:dw|   notice the base of the pyramid, is an SQUARE, thus a square pyramid  $\bf \textit{volume of a pyramid}=\cfrac{1}{3}\cdot \textit{squarish base}\cdot height$

anonymous · Answer

so it would be 64.98??

tkhunny · Answer

Would what be 64.98?  Please try to use complete notation.

Volume: (1/3) * (45 ft*45 ft) * 5 ft = 5*15*45 ft^3 = 3,375 ft^3

See how that is labeled?  All the calculations are right there, for everyone to see.  No one has to guess what is meant.

Your turn.  Calculate the Cubic Yards.