A gardener holds a hose 0.75m above the ground such that the water shoot out horizontally and hits the ground at a point 20m away.What is the speed with which the water leaves the hose?

Answer 1

time in air:
hf=hi-1/2 g t^2
0=.75-4.9 t^2 solve for t
then, in the horizontal

20=vi*t solve for vi