Answer:
If the two side planks are equal lengths then the answer is 26 1/3.
Step-by-step explanation:
hey, hope this helps/ is right :))
Look at attachment
201.1
Hope it helps!!
1/a = xy/(y-x)
Simplify the reciprocal:
1/a = 1/(1/x -1/y) = 1/((y-x)/(xy))
