SSC GD Constable 21 Feb 2024 Shift 2 Paper

Section: Elementary Mathematics
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Question : 56 of 80
 
Marks: +1, -0
A can do a piece of work in 7 hours, B and C can do it in 21/4 hours, and C and A can do it in 7/2 hours. How long will B alone take to do it? 
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