How many three-foot sections are required to insulate 35 feet of straight pipe?

• A. 10 sections
• B. 11 sections
• C. 12 feet
• D. 13 sections

Answer: (C)

You determine how many fixed-length pieces you need by dividing the total length by the length of one piece and rounding up. Here, 35 feet divided by 3 feet per section equals 11 with a remainder. Since you can’t use a fraction of a section, you must add one more whole section, giving 12 sections. That would cover 12 × 3 = 36 feet, which is enough to insulate the 35 feet even though it means a little extra length.

The option listed as “12 feet” isn’t the right way to express the answer because this question asks for a count of sections, not a length. The correct number of sections is 12.