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From the top of tower of height 40 m a b...

From the top of tower of height 40 m a ball is projected upwards with a speed of 20 m/sec at an angle of elevation of `30^(@).` Then the ration of the total time taken by the ball to hit the ground to its time of flight ( time taken to come back to the same elevation) is ( take `g = 10 m//sec ^(2))`

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