Two sky sailors, A and B each of weight 400 N climbed up a rope at a height of 8 m. A takes 20 s and B takes 50 s to accomplish this task. Calculate the power expended by each girl.

Two sky sailors, A and B each of weight 400 N climbed up a rope at a height of 8 m. A takes 20 s and B takes 50 s to accomplish this task. Calculate the power expended by each girl.