Question

How do I find time?

Answer 1

Answer:   3

H = 45 m ,

time required for the stone

  S = u.t+(1/2) g.t²

45  = (1/2) 9.81. t²      since u( initial velocity) = 0 ; S =H.

 t²  = 9.17 s

 t = 3.02 s  

therefore answer is 3 m/s

 if you satisfy with explanation, please give brainiest ;