(02.02) a beverage is made by mixing 3 parts of water with 5 parts of fruit juice. how many parts of water are mixed with 1 part of fruit juice?

Aconstruction worker needs to put a rectangular window in the side of a building he knows from measuring that the top and bottom of the window have a width of 8bfeet and the sides have a length of 15 feet he also measured one diagonal to be 17 feet what is the length of the other diagonal