The measure of the consecutive sides of an isosceles trapezoid are in the ratio 8:5:2:5

Question

the perimeter of the trapezoid is 140 inches if it's height is 20 inches find the area of the trapezoid

Answer 1

20x=140
x=7

so, the sides are 56,35,14,35

The bases are 56 and 14, so the area is (56+14)/2 * 20

The problem is, that if the sides are 35, the height is not 20. Fix that to get the true area.

Answer 2

1031.8