Answer:
Length is 30ft, area is 600ft squared
Step-by-step explanation:
Can you elaborate the question
The equation

<span>defines a hyperbolic cylinder.
</span>
1. Divide the equation

by 900:

.
This is the equation of conic section when z=0 (or z=const) and that is hyperbola equation.
2. To find the domain and the range you should express y:

.
Since you have square root,

. This is the domain, the range is

.