The student setup 30 games booths; the teachers also setup some. if 5/6 of the game booths were set up by the students, how many game booths are there in total?

You're locked out of your house. the only open window is on the second floor, 25 feet above the ground. there are bushes along the edge of the house, so you will need to place the ladder 10 feet from the house. what length ladder do you need to reach the window?