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If six men can do a piece of work in 6 d...

If six men can do a piece of work in 6 days, then 3 men can do same work in
(a) 10 days       
(b)   12 days        
(c)   15 days  
(d)  18 days

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RD SHARMA ENGLISH-RATIO, PROPORTION AND UNITARY METHOD-All Questions
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