Let's assume that the diagram or image that was not attached by you is similar to the image that I attached. The answer below may not be perfect but it is to give you an idea of what is expected of you in this circumstance.
Answer:
2.7 m
Step-by-step explanation:
Please kindly check the attached files for explanation.
(-1,4) is the midpoint of D and E
Answer:185 m , 60 m
Step-by-step explanation:
Given
Length is 5 m more than 6 times its width
Suppose width is 
So, length is given by 
The area is given by 
Put values of length and width

On solving the quadratic equation, we get 
Length is 
Width is 
Answer: The second option.
Step-by-step explanation:
1. Calculate the first volume assuming that the figure is completed (with no missing part). Therefore, you must apply the formula for calculate the volume of a square prism:

Where s is the side of the base and h is the height.
2. Then:

4. The volume of the missing part is calculated with the formula of a rectangular prism:

Where l is the lenght, w is the width and h is the height. Then:

5. Therefore, you must subtract both volumes to obtained the volume of the figure:
