Please help me and show work!! 1.) what is the width of a rectangular solid if the length is 19 feet, the height is 72 inches, and the volume is 570 cubic feet.

2.) one third of the s. s class gave reports on monday, one fourth gave theirs on tuesday, one fifth on wednesday, and three students gave reports on thursday. if the remaining one sixth of the class gave reports on friday, how many students are in the class?