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If A and B together can finish a piece of work in 20 days. B and C in 10 days and C and A in 12 days,

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If A and B together can finish a piece of work in 20 days. B and C in 10 days and C and A in 12 days, then A, B, C jointly can finish the same work in : 

(a) 30/7 days 

(b) 30 days 

(c) 60/7 days 

(d) 7/60 days 

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1 Answer

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Best answer

Correct option (c) 60/7 days

Explanation:

2(A+B+C) = 14 units/day

A+B+C = 7 units/day

(A+B+C) will complete the whole work in

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