The pressure exerted by a certain liquid at a given point varies directly as the depth of the point beneath the surface of the liquid. The pressure at 50 f

Question

I have to find how many pounds per square inch for 30 feet. 

Answer 1

For a direct variation P = kd

• P = Pressure
• d = depth
• k = a constant

 

Your question was truncated so I don't have all of the data, but here's how your solve it:

 

P = kd

P/d = k   for any P and d

 

So (P at 50 ft)/50 = (P at 30 ft)/30

 

Plug in the numbers and solve for P at 30 ft.