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A shell projected from a level ground ha...

A shell projected from a level ground has a range R, if it did not explode. At the highest point, the shell explodes into two fragments having masses in the ratio 1:3, with each fragment moving horizontally immediately after the explosion. If the lighter fragment falls at a distance R from the point of projection, behind the point of projection, the distance at which the other fragments falls from the point of projection is

A

2 R

B

5R/3

C

4R/3

D

2R/3

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The correct Answer is:
B
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