A body is thrown horizontally from the t...

A body is thrown horizontally from the top of a tower and strikes the ground after three seconds at an angle of `45^@` with the horizontal. Find the height of the tower and the speed with which the body was projected. (Take ` g = 9.8 m//s^2`)

`9.8 ms ^(-1)`

`19.6ms ^(-1)`

`29.4ms ^(-1)`

`39.2ms^(-1)`

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