At what depth would water pressure be 4 times greater than atmospheric pressure at the surface?
A) 10 meters
B) 20 meters
C) 30 meters
D) 40 meters
E) 50 meters

Question

Quizplus · Accepted Answer

The pressure of water increases by 1 atmosphere (or 1 bar or 14.7 psi) for every 10 meters of depth. So, at a depth of 40 meters, the water pressure would be 4 times greater than atmospheric pressure at the surface (since 4 x 1 atmosphere = 4 atmospheres). None of the other choices match this condition.

At What Depth Would Water Pressure Be 4 Times Greater