An aerplane is flying at a height of 1960m in horizontal direction with the velocity of 360km/h. When it is vertically above the ground ,

An aerplane is flying at a height of 1960m in horizontal direction with the velocity of 360km/h. When it is vertically above the ground , CJG o

H=1960m
g=9.8m\s^2
t=?2H\g
t=?2?1960\9.8
t?400
t=20sec
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