A smooth tunnel is dug along the radius of the earth that ends at the centre of earth. A ball is released from the surface of earth along the coefficient of restitiution is 0.2 between the end of tunnel and ball then the total distancetravelled by the ball second collision at the centre of earth is

A smooth tunnel is dug along the radius of the earth that ends at the

1.	A smooth tunnel is dug along the radius of the earth that ends at the centre of earth. A ball is released from the surface of earth along the coefficient of restitiution is 0.2 between the end of tunnel and ball then the total distancetravelled by the ball second collision at the centre of earth is
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