Please help me on how to solve diz XD
"A block of Granite is in the form of the frustum of a regular square pyramid whose upper and base lower base edges are 3ft and 7ft.., Respectively, if each of the lateral faces is inclined at an angle of 62^{o} 30' to the base , Find the volume of the granite in block"
as seen on the book "Solid Mensuration By Kern And Bland 2nd Edition" #9 page 71
Thanks in advance !!