Apurv

A man can swim at a speed of 3km/hr in still water. He wants to cross a 500m wide river flowing at 2km/hr. He keeps himself always at an angle of 120¡ãwith the water flow while swimming. Find (A) The time he takes to cross the river (B) The point on the o...

Displacement should be in negative... as the ball thrown vertically downward.....

So we solve.... s=ut - 1/2gt^2..... put t=2, s=-25.2m After obtaining the value of u...using 1st eqn of motion... v=u-gt Then v is ur required answer