Two particles one of mass m and the othe...

Two particles one of mass m and the other of mass 2 m are projected horizontally towards each other from the same level above the ground with velocities 10 m/s and 5 m/s respectively . They collide in air and stick to each other . The distance from A , where the combined mass finally land is

40 m

20 m

30 m

45 m

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