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Answer:
Step-by-step explanation:
Givens
w = 1/2 L
width = w
Perimeter = 63 in
Formula
P = 2w + 2L
63 = 2(1/2L) + 2L
Solution
63 = L + 2L
63 = 3 L Divide by 3
63/3 = 3L/3
L = 21
w= 21/2 = 10.5
Check
P = 2L + 2w
P = 2*21 + 2*10.5
P = 42 + 21
P = 63 which it should.