Geometry
posted by caity .
a trapezoid has one base 20, a secind base 15, and an area of 60. what is the altitude of the trapezoid?

I will assume you are saying that the two parallel sides are 20 and 15 units long
let the height be h
(20+15)(h)/2 = 60
35 h = 120
h = 120/35 = 24/7 units