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A body of mass 2 gm is projected horizon...

A body of mass 2 gm is projected horizontally from the top of a tower of height 20m with a velocity 10 m/s. The charge on the body is 2C. Electric field is applied vertically downwards and of intensity `10^(-2) N//C`. Find the time taken by the body to touch the ground `(g=10m//s^(2))`.

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