A missile is projected so as to attain it's maximum range.calculate the maximum height attain,if the initial velocity of projection is 200m/s(g=10m\s^2)

Answer 1

max range is at an angle of 45°, so the upward velocity is 200/√2
v^2 = 2gs, so max height is s = 200/19.62 = ____ m

Answer 2

oops - that would be 20000/19.62 = ____ m