The answer is 9.5 ( rounded, answer is 9.486833)
It depends on what contract you are signing if you are having doubts then yes but not then no!
Answer:
Length = 30
Height = 10
Step-by-step explanation:
Formula for the area = height * length. We know that the height of the wall is 1/3 of its length. This gives us another formula which is 
Now substitute this into the formula, while knowing that the area is 300.
So we have 300 = 
Solving for l gives us 30 and then substituting it back into the equation
, will give us that the height is 10.
Hope this helps
First,

The volume is given by the integral (one of 6 possible combinations),
