Answer:
the answer is 55 degrees
Step-by-step explanation:
So first I saw that u need 1 adult with every 6 children so I did 6*4 and got 24. From that I got 4 adults with 2 leftover children. For the other class which has 28 children, u would still need 4 adults. Now since u said the teacher is included as an adult only 3 more are needed for the trip, and that is your answer.
Volume of cylinder =

if height is doubled the volume is doubled
You have to make a proportion:
12+x/8=8/x
Then cross multiply to solve for x