It would be 9 ft. using the knowledge of

times the diameter (

equals aprox. 3.14) equal the circumference of a circle, and since we know the circumference, we need to divide that by

to get the diameter.
equation: 28/3.14=8.913
rounding that would bring it to 9 ft.
If you multiple the numbers together...you will get the answer....480 pounds of water in total
Answer:
25+4+120(2min) = 149
25/149 = 0.16778523489932885906040268456376
= (rounded) 0.17