The load that can be supported by a rectangular beam there is jointly as the width of the beam in the square of its height and i
nversely as the length of the beam a been 14 feet long with the width of 4 inches and the height of 6 inches can support a maximum load of 800 pounds if a similar board has a width of 9 inches and the height of 5 inches how long must be to support 1400 pounds
The equation you would use to solve this is (x1+x2/2 , y1+y2/2) so when you plug in the numbers you get this (6+14/2 , 3+9/2) which eventually simplifies into (10, 6)