potlight on the ground shines on a wall 12 m away If a man 2 m tall walks from the spotlight toward the building at a speed of 1

Question

potlight on the ground shines on a wall 12 m away If a man 2 m tall walks from the spotlight toward the building at a speed of 1 3 m s how fast is the length of his shadow on the building decreasing when he is 4 m from building Round your answer to one decimal place x m s

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