posted by Anonymous on .
Two trees have perfectly straight trunks and are both growing perpendicular to the flat horizontal ground beneath them. The sides of the trunks that face each other are separated by 1 m. A frisky squirrel makes three jumps in rapid succession. First, he leaps from the foot of one tree to a spot that is 0.9 m above the ground on the other tree. Then, he jumps back to the first tree, landing on it at a spot that is 1.8 m above the ground. Finally, he leaps to the other tree, now landing at a spot that is 2 m above the ground. What is the magnitude of the squirrel's displacement?