Does anyone know how to do this question?

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

8. kelly wants to buy a magazine that is $25. later the magazine was marked up an additional 20%. what is the new price?

Akitchen is 12 ft. by 14 ft. with 10 ft. high walls. how much would it cost to put vinyl flooring in this room? $8.80 per ft