At what speed is the skier moving when she reaches the peak of the second hill?

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A woman of mass 55 kg begins motionless atop a hill. She skis all the way down the frictionless hill, which is 90 m high, to height 0 m, and then she ascends another hill that is 75 m high. This skier is in a conservative system, with gravity as the only force acting upon her.



At what speed is the skier moving when she reaches the peak of the second hill?