Well, you wrote a list of 10 numbers, and you called the list "Their answers".
If their answers are written as a list of 10 numbers, and if there's no hanky panky going on that you're not telling us, then the 10 answers came from asking 10 students.
The formula for volume is width * height * length or w*h*l. to do this problem you have to do 8*6*10 which is 480. so, the volume of the room is 480 ft^3 (cubed).