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A man 180 cm tall walks at a rate of 2m/...

A man 180 cm tall walks at a rate of 2m/sec. away, from a source of light that is 9 m above the ground. How fast is the length of his shadow increasing when he is 3 m away from the base of light?

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RD SHARMA ENGLISH-DERIVATIVES AS A RATE MEASURER -All Questions
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