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A man 2 m tall,walks at the rate of 5/3 ...

A man 2 m tall,walks at the rate of `5/3 m/s` towards a street light which is `16/3 m` above the ground.At what rate is the tip of his shadow moving? At what rate is the length of the shadow changing when he is `10/3 m` from the base of the light?

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The correct Answer is:
`-2 2/3`
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