The shadow

Calculus Level 3

A man 1.5 m 1.5\text{ m} tall walks away from a light post 4.5 m 4.5\text{ m} high at the rate of 4 km/hr 4 \text{ km/hr} .

Find how fast is the shadow lengthening (in km/hr \text{km/hr} )?

1 Cannot be determined 0 2

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