posted by hank .
A tank contains mercury, whose density is 13 600 kg/m3. Find the force exerted by the mercury on a circular plug at the bottom of the tank. The plug has a diameter of 2.54 cm, and is located 37.6 cm below the surface of the mercury.
The answer is 25.4 N but I don't know how to go through and get find this.
I really need help with this question please