Answer:
41 feet
Explanation:
Let x be the length of the shorter base
Longer base = 5x-19
Area = (x+5x-19)*18/2
477 = (6x-19)*9
Divide by 9,
53 = 6x-19
Add 19,
72 = 6x
Divide by 6,
x = 12
5x-19 = 5*12-19 = 60-19 = 41
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