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in this lesson weamp;#39;re going to focus on the shadow problem in related rates so we have a six foot man and he walks at a rate of three feet per second away from a street light and his street light is 21 feet tall now letamp;#39;s draw a picture so letamp;#39;s say thatamp;#39;s the ground and here is the street light now letamp;#39;s say this is the person now letamp;#39;s draw a line from the street light to the person and so this is going to be the shadow thatamp;#39;s formed behind the person from the light now we said the street light is 21 feet tall and the man heamp;#39;s six feet tall and letamp;#39;s say the distance between the man and the light is x and s will represent the length of the shadow and l will be the sum of x and s at what rate is the length of his shadow changing when he is eight feet from the light and then part b at what rate is the tip of the shadow moving when he is ten feet from the light so part a is asking for ds dt thatamp;#39;s the rate at
