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A fighter plane enters inside the enemy ...

A fighter plane enters inside the enemy territory, at time `t=0`, with velocity `upsilon_(o)=250m//s` a moves horizontally with constant acceleration `a=20m//s^(2)` (see figure) An enemy tank at the border, spot the plane and fire shots at an angle `theta=60^(2)` with the horizontal and with velocity `u=600 m//s`.At what altitude `H` of the plane it can be hit by the shot?

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