Calculate Hydrostatic Force on 4x3 ft Triangle in 6 ft Tank

[phil45]

A tank that is filled 6 feet deep with water has a 4x3 foot, right triangular plate submerged into it so the 3 foot side is parallel to the bottom of the tank. The top of the triangle is one foot below the surface. Calculate the hydrostatic force on one of it's sides. The density of water is approximately 62.5 lbs/ft^2.


I went through it once and got 1375 lbs, but I'm not sure if that is correct

 

[HallsofIvy]

Since you don't show any work at all, I can only say, no, I don't get anything like that. How did you get that answer?