Question
A and B together can finish a job in 20 days. B and C
together can finish the same job in 30 days. If A and C together can finish it in 24 days, then how many days can A alone finish the job?Solution
ATQ,
We’re given: A + B = 1/20 B + C = 1/30 A + C = 1/24 Add all three 
So, 
Subtract (B + C = 1/30): 
 or 36(2/7) days
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