Question 15888
{{{P = 15 + (1/2)*D}}}, where P is the pressure in pounds per square inch and D is the depth in feet. Use this equation to find the depth when the pressure is 40 lb/in^.
 to get the depth  ,we have to substitute the value of pressure in the given equation
 40  = 15+(1/2)*D
  (1/2)*D =40-15 = 25
     D = 25*2 =50 
  D = 50 feet