SOLUTION: Hi I asked for help before on this question and no one responded. I know its because its confusing. The problem is a trapazoid. The question is find volume in cubic feet. Here's

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Question 375422: Hi
I asked for help before on this question and no one responded. I know its because its confusing. The problem is a trapazoid. The question is find volume in cubic feet. Here's my problem. The diagram only has one base(lower base) 25 feet. The shorter side is 9 feet and the longer side is 16 feet. and I think the three dimensional side to the right of the diagram is considered the depth? this is 18 feet. I know the formula for a trapezoid A=1/2 h (a+b)= but I'm not sure if I did 1/2 . 16.(25 + 9 )
1/2 . 16 .( 34 )
1/2. 544 = 270 is correct. Do you multiply that by 18
or is the whole problem WRONG because I"m not using a upperbase because I don't know what the upperbase is??? In the problem she gave us there are only four sets of numbers. 9 feet side, 16 feet side 25 feet base and 18 feet depth. It does not have a number for the upperbase. So I'm totally lost. Can anyone help please???? Thank You ever so much.
Janet
Answer by Earlsdon(6294) (Show Source):
You can put this solution on YOUR website!
Janet, the best I can do with your description is the following:
It looks like you have a three-dimensional solid with one face in the shape of a trapezoid.
The trapezoid has dimensions of:
Base = 25ft.
Left side (perpedicular to the base) = 9ft.
Right side (perpendicular to the base) = 16ft.
Now extend this trapezoid shape 18ft. (We'll call this the "depth" of the solid) away from, but perpendicular to, the 25ft. base.
To find the volume of this solid, first find the area of the trapezoid.
Substitute , , and

sq.ft.
Now find the volume by multiplying the area of the trapezoid (312.5sq.ft.) by the "depth" (18ft.).

cu.ft.
I hope I have interpreted your description correctly.