Answer:
8.1 gallons of gas
Step-by-step explanation:
240/9=216/x
simplify 240/9 into 80/3,
80/3=216/x
cross product
3*216=80*x
648=80x
x=648/80
x=8.1
Volume = πr²h
3.14 * (18 : 2)² * 12 =
3.14 * 9² * 12 =
3.14 * 81 * 12 =
254.34 * 12 =
3052,08 mm³
x = 2 ± √11 (I believe)