A boy released a balloon vertically in the middle of a hemispherical dome at a velocity of 5 m/s. The diameter of the dome is 100 m. A searchlight was placed at the circumference of the dome at the base. How fast is the shadow of the balloon moves along the roof when the balloon is 30 m high? 125/17 m/s 145/17 m/s 32/5 m/s None of the choices 105/17 m/s

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