[tex]an\ explosive\ shell\ can\ travel\ 500\ yards\ in\ 1.5\ seconds\ \ \ \rightarrow\\.\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \rightarrow\ \ \ \ 1000\ yards\ in\ 3\ seconds\\\\diameter = 25\ yards\ \ \ \ \ \rightarrow\ \ \ \ radius=12.5\ yards\\\\1000+12.5=1012.5\ [yards]\\\\Answer:\\ The\ farthest\ away\ a\ target\ could\ be\ hit\ with\ a\ shell\ is\ 1012.5\ yards[/tex]