Question

Henry has a wooden chest that has a length of 312 ft, a width of 114 ft and a height of 2 ft. Henry sands the entire outside of the chest with sandpaper. How many square feet of wood does Henry sand?

Answer 1

The surface area of a rectangular prism is:

A=2(xy+xz+yz) where x,y, and z are the dimensions, in this case:

A=2(312*114+312*2+114*2)

A=2(35568+624+228)

A=2(36420)

A=72840 ft^2