Question

A and b can do a work in 12 days b and c in 15 days c and a in 20 days if a b c work together they willl complete the work in

Answer 1

• (A+B)'s one day work = 1/12 th part
• (B+C)'s     ''      ''     ''    ''  = 1/15 th part
• (C+A)'s  ''     ''         ''     ''   = 1/20 th part

A/Q, (A+B)+(B+C)+(C+A) =  1/12 + 1/15 + 1/20

 2( A+B+C) = 12/60

 2 (A+B+C) = 1/5

 (A+B+C) = 1/10

So , A , B and C can do in 10 days.

Thank u.

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