The question is asking to calculate how fast is the water level rising when the water is 9 inches deep and base on the said question or problem, and in my own understanding and computation about the said problem, the speed of the rising of the water level is 24/63 feet per minute. I hope this would help
If x=6 it is
9. 5
10. 18
11. 23
12. 5.5
13.68
if x=3 it is
2
15
8
11
41
Must be 16 and 21 because we can see
30 and 70 has 10 as factor
24 and 44 has 2 as factor
12 and 30 has 2 as factor and all those factors are greater than one