A and B can complete a work in 12 days, B and C in 15 days and C and A in 20 days. If A, B and C work together, they will complete the work in?

5 days

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days

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10 days

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days

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8 days

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Solution

The correct option is C
10 days

Let A take a days, B take b days and C takes c days to complete the work.

$2 (\frac{1}{a} + \frac{1}{b} + \frac{1}{c}) = \frac{1}{12} + \frac{1}{15} + \frac{1}{20}$

Total work would be done in 10 days if they work together.

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A and B can complete a work in 12 days, B and C in 15 days and C and A in 20 days. If A, B and C work together, they will complete the work in?

The correct option is C 10 days Let A take a days, B take b days and C takes c days to complete the work. 2(1a+1b+1c)=112+115+120 Total work would be done in 10 days if they work together.

The correct option is C
10 days

Let A take a days, B take b days and C takes c days to complete the work.

$2 (\frac{1}{a} + \frac{1}{b} + \frac{1}{c}) = \frac{1}{12} + \frac{1}{15} + \frac{1}{20}$

Total work would be done in 10 days if they work together.