A turtle starts from rest and is moving with a constant acceleration along a straight ditch. He starts before a fence post. As he passes the fence post, he starts his stopwatch and notes that it takes him 10.0 s to reach a pine tree 10.0 m further along the ditch. As he passes the pine tree, he notes that his speed is 1.20 m/s. How far was he from the fence post when he started from rest?