the bottom section is made in the shape of a rectangular prism with a height of 4o feet and base edges of 50 feet. the top of this prism has been...

the bottom section is made in the shape of a rectangular prism with a height of 4o feet and base edges of 50 feet. the top of this prism has been removed. the top section is made in the shape of a square pyramid with the height of 30 feet and base edges of 50 feet. the base of this pyramid has been removed. the two sections are joined together to create a single silo without any gaps or overlaps between the two sections. calculate the amount of material required to construct the silo.