Think about a really long, flat 3-dimensional object. This has a certain volume, and a certain (big) surface area because of its length. Now, make the 3-dimensional object fat and maintain the volume. Notice how you have minimized surface area but maintained volume. This is how I would go about solving it.
In the perimeter just add all the measurement you see and the 10m add another 10m because at the upper side is the same lenght
Given:
In a right triangle at B,

To find:
The length of the sides b and c and angle B.
Explanation:
Using the trigonometric ratio,

Using the trigonometric ratio,

Using the angle sum property,
The angle B becomes,

Final answer:
The values are,
Answer:
see below
Step-by-step explanation:
The graph has a discontinuity at x=0, where the function is defined as (0, 4), not (0, 0).