Answer: 
Step-by-step explanation:
The formula for calculate the volume of a cylinder is:

Where "r" is the radius and "h" is the height.
Make the conversion from inches to feet. Since
,you get:

So in this case you can identify that:

Then, substituting them into the formula and simplifying you get:

Therefore, the expression for the volume of L feet of drainage tubing, in cubic feet is:

13)
A = bh
h = A/b
h = 211.4 / 24.3
h = 8.7
answer
height = 8.7 m
Area of a rectangle = W X L
Area of a rectangle = 5 X 2
Area of a rectangle = 10
Area of triangle 1= 1/2 X B X H
Area of triangle 1= 1/2 X 2 X 2
Area of triangle 1= 1/2 X 4
Area of triangle 1= 2
Area of triangle 2= 1/2 X B X H
Area of triangle 2= 1/2 X 7 X 4
Area of triangle 2= 1/2 X 28
Area of triangle 2= 14
Area of a rectangle + Area of triangle 1 + Area of triangle 2=
10 + 2 + 14 = 36