A kite remains directly above a point 30 m downwind from the person holding the string

MATHEMATICS · Single correct · CBSE · Mathematics · Applications of Derivatives · Applications of Derivatives

Problem

A kite remains directly above a point 30 m downwind from the person holding the string. The string is being let out at a rate of 5 m/s. When the length of the string is 50 m, how fast is the kite rising? (a) 4.00 m/s4.00\text{ m/s} (b) 6.25 m/s6.25\text{ m/s} (c) 8.33 m/s8.33\text{ m/s} (d) −6.25 m/s-6.25\text{ m/s}

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