Mohon jawaban nya ya....

Diketahui :
V = 400 m/s
theta = 30 derajat
h = 880 m
g = 10 m/s^2
Ditanya : t = ?
Pembahasan
Vx = 400 cos 30 = 200 akar 3 m/s
Vy = 400 sin 30 = 200 m/s
h = Vy.t + 1/2 g t^2
880 = 200t + 5t^2
t^2 + 40t - 176 = 0
(t-4)(t+44) = 0
t = 4 sekon