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  1. R

    EASY A can do a piece of work in 6 days and B can do the same piece of work in 12 days

    Lcm of 6,12=12 Now efficiency of A nd B is respectively 2 and 1 They will work together 12/(2+1)=4 -Ravi (BSc Physics)
  2. R

    Hlo

    Hlo
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