Answer: 18 feet
Step-by-step explanation:
1 1/2 - 3/4 = 3/4
3/4 x 1 1/2 = 1 1/8
1 1/2 - 1 = 1/2
3/4 x 1/2 = 3/8
1 1/8 + 3/8 = 1 1/2
1 1/2 inches x 12 = 18 feet
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