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19. Two particles are moving in space whoseposition vectors at t = 0 are (21+ 41 - 4k)mand (-9 k) m. At instant, their respectiveposition vectors are (31 +6j - k) m and(31 + 6). From t = 0 to t = t.(a) Their displacement are parallel to eachotherb) Their displacement are equal(c) The ratio of their magnitude ofdisplacement is 1:2(d) The magnitude of their displacement are

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it doesn't look clear

it doesn't look clear



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