<human>:  There are three trees in Eddy's backyard. The shortest tree has a height of 6 feet, and the second tree has a height of 5 feet more than the shortest tree. The height of the tallest tree is twice the height of the two trees combined. How tall is the tallest tree?
<bot>: How tall is the second tree? ** The height of the second tree is 6 + 5 = <<6+5=11>>11 feet.
How tall are the two trees combined? ** Thus, the combined height of the two trees is 6 + 11 = <<6+11=17>>17 feet.
How tall is the tallest tree? ** Therefore the height of the tallest tree is 2 x 17 = <<2*17=34>>34 feet.
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