The answer would be s=-60
Formula for the volume not a cone=πr2H. π=3.14. R=12×2=24. H=16. 3.14×24=75.36. 75.36×16=1205.76. ANSWER: 1205.76
Step-by-step explanation:

The tank fills to 16 gallons of water as a maximum. After that it would start overflowing.