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 :
