A grain silo is show below ,168 length and 6 width what is the volume of the green in the completely fill the cello rounded to the nearest whole number use 22/7

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?