Two buses leave houston at the same time and travel in opposite directions. one bus averages 55 mi/h and the other bus averages 45 mi/h. when will they be 400 miles apart?

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