Answer:
Perimeter is distance around the room.
Perimeter = 14 + 10 +14 +10 = 48 feet
Rolls needed = Perimeter / roll length = 48 /20 = 2.4.
Since you can't buy a partial roll you have to get a full roll
Rolls need = 2.4 rounded up to the next number is 3.
Answer is C.
Explanation: