**Question :** A ball is thrown vertically upwards from the top of a tower of height β with velocity π£. The ball strikes the ground after

(A) \dfrac{v}{g}\left[ 1+\sqrt{1+\dfrac{2gh}{r^{2}}}\right]

(B) \dfrac{v}{g}\left[ 1-\sqrt{1+\dfrac{2gh}{r^{2}}}\right]

(C) \dfrac{v}{g}\left( 1+\dfrac{2gh}{v^{2}}\right) ^{\dfrac{1}{2}}

(D) \dfrac{v}{g}\left( 1-\dfrac{2gh}{v^{2}}\right) ^{\dfrac{1}{2}}

**Answer :** option (A)

**Solution :**

*Related*