The body is thrown vertically upward with an initial speed of 30 m / s. Find the time of rise and the height to which the body will rise

Given: vertically upward, v0 = 30 m / s.
Find: t, h
Decision :
Formula for body thrown upwards:
v = v0-gt
v will be equal to 0, since the body will rise to the maximum height and “hang” there for a while, that is, it will stop.
0 = 30 m / s – 10 m / s ^ 2 * t
10t = 30
t = 3 (c)
h = v0 * t – (gt ^ 2) / 2
h = 30 * 3 – (10 * 3 * 3) / 2
h = 90 – 45
h = 45 (m)
Answer: t = 3c, h = 45m.