First, note that
1 yard = 3 foot,
1 feet = 12 inches.
Now add all lengths:
15 ft 4 in + 9 ft 2 in + 14 ft 7 in + 10 ft 11 in +5 ft 8 in = 53 ft 32 in.
Since 32 in = 24 in + 8 in = 2 ft 8 in, then
53 ft 32 in = 53 ft + 2 ft 8 in =55 ft 8 in.
Since 55 ft = 54 ft + 1 ft = 18 yd 1 ft, then
55 ft 8 in = 18 yd 1 ft 8 in.
Answer: correct choice C
