Greg runs across country. He runs 5 miles in 40 minutes. He runs 20 miles in 160 minutes. If he keeps the same place, how long will it take him to run 15 miles?

Answer asap and if you do you will get brainliest. catherine buys a gallon of ice cream from the store. after taking it home, she eats a fifth of a gallon of ice cream. her sister eats some of the ice cream as well. if two-thirds of the original amount of ice cream is left, then what fraction of a gallon of ice cream did her sister eat?