The length of longer base is 41 feet
<em><u>Solution:</u></em>
<em><u>The area of trapezoid is given as:</u></em>
Where , "a" and "b" is the length of base and "h" is the height
The length of one base of a trapezoid is 19 less than five times the length of the other base
a = 19 less than fives times b
a = 5b - 19
Height of 18 feet and an area of 477 ft squared
h = 18 feet
area = 477 square feet
<em><u>Substitute the values in above formula</u></em>
Therefore,
a = 5b - 19 = 5(12) - 19 = 41
Thus length of longer base is 41 feet