Respuesta :
Answer:
w = 30
Step-by-step explanation:
a = lw
l = 2w
a = 2w × w
1800 = 2w × w
1800 ÷ 2 = w × w
900 = w × w
square root of 900 = square root of w^2
(I don't have the symbol for square root)
30 = w
check work:
a = lw
l = 2w
l = 2(30)
l = 60
1800 = 60 × 30
1800 = 1800
correct answer