Always had a desire to fly kite with sos

Classical Mechanics Level 3

I am flying a kite. The kite is moving horizontally at $151.5m$ above the ground. If the speed of the kite is $10m/s$ . How fast (in m/s) is the string being let out,when the kite is $250m$ from me ? (assuming my height to be $1.5m$ ) ?

Always had a desire to fly kite with sos

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