Answer :
Answer: Width = 45 feet; Length = 15 feet;
Step-by-step explanation: Start by substituting 3w for the length because it says that in the problem. We know that 2(L+W) equals the perimeter. Since we substituted 3w for length we get 8w for the perimeter. Divide 120 by 8 to find that the width is 15 feet and plug it into 3w to get the length of 45 feet.
Answer:
45 feet and 15 feet are the length and width
Step-by-step explanation:
P = 120 feet
a (length) = 3 * b (width)
P = 2 * (a + b)
P = 2 * (3b + b)
P = 2 * 4b
P = 8 * b
=> 8b = 120 feet
P = 120 feet
b = 120 / 8
b = 15 feet
a = 3 * b
a = 3 * 15
a = 45 feet
