A stone thrown upward with a speed 𝑢 from the top of the tower reaches the ground with a velocity 3𝑢.The height of the tower is

Question : A stone thrown upward with a speed 𝑢 from the top of the tower reaches the ground with a velocity 3𝑢.The height of the tower is

(A) \dfrac{3u^{2}}{g}

(B) \dfrac{4u^{2}}{g}

(C) \dfrac{6u^{2}}{g}

(D) \dfrac{9u^{2}}{g}

Answer : option (B)

Solution :

A stone thrown upward with a speed 𝑢 from the top of the tower reaches the ground with a velocity 3𝑢.The height of the tower is
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