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A tank is initially at a perpendicular distance BT=360m from the plane of firing as shown.The enemy tank is moving with a speed of 9m/s in direction TA as shown in figure.A gun can fire shell in y-z plane only with a speed 100m/s at an angle of 53° such that the shell lands at points A. If tank started at t=0 then time interval (in sec) after which shell is to be fired to hit the tank is
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