Solve the belw problem:
Q: An automatic valve consists of a 225 * 225-mm square plate that is pivoted about a horizontal axis through A. If the valve is to open when the depth of water is d = 450 mm, determine the distance h from the bottom of the valve to the pivot A.
![1793_Distance from the bottom of the valve.jpg](https://secure.tutorsglobe.com/CMSImages/1793_Distance from the bottom of the valve.jpg)