Given:
The area of the rectangular garden is 18z+24 sq ft.
To find the possible dimensions of the garden.
Formula
The area of the rectangular garden is

where,
l be the length of the rectangle
b be the width.
Let us take l and b be the length and width of the given rectangular park respectively.
Now,
According to the problem,

or, 
We can determine that,
l = 6 and b = 3z+4 or vice versa.
Hence,
The possible length and width of the rectangular garden is 6 and (3z+4) respectively.
Answer:
35/72 
Step-by-step explanation:
Rectangle Formula: 
Switch the variables with the numbers given:

Multiply the top and bottom:
5*7 = 35
9*8 = 72
35/72 = Area
5 is 1/40 of 200.
Therefore, 35 is 7/40 of 200.
7/40 = (17.5)/100. Therefore, 35 is 17.5% of 200.
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To make life easier. Just say that 35/200 =17.5/100.
So 35 is 17.5% of 200.
Answer:
The height would be 18.99