I have a question that even a maths/physics teacher having problem solving, does anyone have any idea how to work is out?
A line of Army men starts marching along the road. The length of the line is X metre and is moving at a constant speed. A Sergeant, doing inspections, begins at the rear of the line, marches forward toward the front of the line. When he reaches the front of the line, he promptly turns around, and marches back to the rear of the line. While the sergeant was performing his inspection, the line moved X metre. Assuming that all people travel at constant speeds, what was the ratio between the speed of the sergeant and the speed of the Army line?