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In the second system of pulleys, if there are two pulley blocks having 'n1' and 'n2' pulleys in the first and second pulley blocks respectively, then the velocity ratio of the whole system will be equal to

[A].	2n1 + 2n2	[B].	2n1 + n2
[C].	n1 + n2	[D].	n1 - n2

Answer: Option D

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