98 √6 feet is required for all 3 sections.
6 √96 + 12 √150 + 2 √294 = 0
Simplify each radical to be the same.
6 √96 = 6 √16 6 = 6 4 √6 = 24 √6
12 √150 = 12 √25 6 = 12 5 √6 = 60 √6
2 √294 = 2 √49 6 = 2 7 √6 = 14 √6
Add the radicals.
24 √6 + 60 √6 + 14 √6 = 98 √6 feet