Answer: B) 54 feet
Explanation:
Hi, to answer this question we have to apply the next formula:
Perimeter of a rectangle: 2L + 2 W
Where:
L= Length
W= Width
Replacing with the values given:
Perimeter: 2(15)+2(12)=30+24=54 feet
In conclusion, they need 54 feet. The correct option is option B).
Feel free to ask for more if needed or if you did not understand something.