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# The initial speed of a bullet fired from a rifle is 630 m/s . The rifle is fired at the centre of a target 700 m away at the same level as the target . How far above the centre of the target the rifle must me aimed in order to hit the target ?

$(a)\;1.0\;m \qquad(b)\;4.2\;m\qquad(c)\;6.1\;m\qquad(d)\;9.8\;m$