Question
115.From the top of a tower two balls are thrown horizontally with velocities U1 and U2 in opposite directions simultaneously. If the velocities are perpendicular to each other just before they strike the ground the height of Tower is (a) (U1 + U2)/2g (b) (U1 - U2)/2g (c) (U1 + U2)/2g (d) (U1U2)/2g