Question

A and B can do a piece of work in 15 days Band C in 12 days C and A in 20 days . how many days will takeen by A,B and C working together to finish the work​

Answer 1

Answer:

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Step-by-step explanation:

LCM(12,15,20) = 60

Now this 60 units can be treated as the total work

One day work of A and B = 60/15  = 4 units

One day work of B and C = 60/12  = 5 units

One day work of C and A = 60/20 = 3 units

Now if we add all three we get:-

2(A+B+C) = 12 units

So one day work of A, B and C put together is 12/2 = 6 units

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