A man standing on the roof of a house of...

A man standing on the roof of a house of height h throws one particle vertically downwards and another particle horizontally with the same velocity u . The ratio of their velocities when they reach the earth's surface will be

`sqrt(2gh + u^2) : u`

`1 : 2`

`1 :1`

`sqrt(2gh + u^2) : sqrt(2gh)`

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