Answer:
3 feet 10 inches
or
46 inches
Step-by-step explanation:
In order to determine the total length of the wood, convert 11 feet to inches
1 feet = 12 inches
11 x 12 = 132 inches
132 + 6 = 138 inches
If the length of each shelve is equal,
length of each shelve = 138 / 3 = 46 inches
or 46/12 = 3 feet 10 inches