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An object is thrown from a point 'A' hor...

An object is thrown from a point 'A' horizontally from a tower and hits the ground 3s later at B. The line from 'A' to 'B' makes an angle of `30^(@)` with the horizontal. The initial velocity of the object is `15sqrt(x)m//s`. Find x : (take `g=10m//s^(2)`)

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