Final answer:
The length of each side of the square table is approximately 19.8 feet.
Step-by-step explanation:
To find the length of each side of a square table whose area is 392 sq.ft., we can use the formula for the area of a square which is length x width. In this case, since it's a square, both the length and width are the same. So, we need to find the number that, when squared, equals 392. Taking the square root of 392 gives us approximately 19.8. Therefore, the length of each side of the square table is approximately 19.8 feet.