I think it’s D. 102 but it may not be.
Answer:

Step-by-step explanation:
From the question we are told that:
Length 
Top length 
Height 
Rate 
Water rise 
Generally the equation for Velocity is mathematically given by


Therefore

Where

Therefore



This can be rewritten as
(x -6)² = 90 . . . . . the left side is already a perfect square
x -6 = ±√90 . . . . . take the square root
x = 6 ±3√10 . . . . add 6
Answer:
I wish i could help but I'm only in the 5 grade but I wish you best of luck
Step-by-step explanation:
sorry wish I could help