A spotlight on the ground is shining on a wall 16m away. If a woman 2m tall walks from the spotlight toward the building at a

Question

A spotlight on the ground is shining on a wall 16m away. If a woman 2m tall walks from the spotlight toward the building at a speed of 0.6m/s, how fast is the length of her shadow on the building decreasing when she is 6m from the building?

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