Let's denote the length of the pool as "x" feet.
Given information:
Length of the deck: 6 feet
Total length of the pool and deck combined: 36 feet
Since the total length of the pool and deck combined is 36 feet, we can set up the equation:
Length of the deck (6 feet) + Length of the pool (x feet) = Total length (36 feet)
6 + x = 36
Now, let's solve for x (the length of the pool):
x = 36 - 6
x = 30 feet
So, the length of the pool is 30 feet.