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A boy on a flat car which is moving up a...

A boy on a flat car which is moving up a plane inclined at `53^(0)` to the horizontal with a constant speed `5ms^(-1)` .He throws a ball towards a station hoop located perpendicular to the incline in such a way that the ball moves parallel to the slope of the incline while going through the hoop. The hoop is 4m in perpendicular direction of inclined plane. The time (in second) taken by the ball to reach the hoop is `2/sqrt(n)`.Find the value of n

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