Two stones are thrown up simultaneously from the edge of a cliff 240 m high with initial speed of 10 m/s and 40 m/s respectively. Which of the…

Two stones are thrown up simultaneously from the edge of a cliff $\displaystyle 240$ m high with initial speed of $\displaystyle 10$ m/s and $\displaystyle 40$ m/s respectively. Which of the following graph best represents the time variation of relative position of the second stone with respect to the first ? (Assume stones do not rebound after hitting the ground and neglect air resistance, take $\displaystyle \mathrm{g}=10 \mathrm{~m} / \mathrm{s}^2$ ) (The figures are schematic and not drawn to scale)