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Two particles A and B are moving in XY plane. Particle A moves along a line with equation y=x while B moves along X axis such that their X coordinates are always equal. If B moves with a uniform speed 3 m/s, the speed of A is:
A. |
3 m/s |
B. |
`1/2` m/s |
C. |
`3sqrt2` m/s |
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D. |
`3/sqrt2` m/s |