Answer:

Explanation:
Here, we want to get the maximum load supported
From the first part of the question, we have it that:
The maximum load g, varies jointly with the width w and the height h, and inversely as the length l between the supports
Mathematically, we have that as:

where k is the proportionality constant
Now, let us get the value of k
We substitute the first set of values as follows:

Now, using this value of k, we want to get the value of g
Mathematically, we have that as: