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Two stones are thrown up simultaneously ...

Two stones are thrown up simultaneously from the edge of a clir 240 m high with initial speed of 10 m/s and 40 m/s respectively. Which of the following graphs 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 `g=10 m/s^2`) (The figures are schematic and not drawn to scale).

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