A ball is dropped from rest from a height

Question

of h. It takes 1 second for the ball to drop
from h/2 to the ground. From what
height was the ball dropped?

Answer 1

timetofall=1=sqrt((h/2)/4.9 from h/2=1/2 g t^2
h/2= 4.9^2 * 1
h=2*4.9^2 check that.