1.

A and B together can do a piece of work in 8 days, B and C together in 10 days, while C and A together in 6 days, if they all work together the work will be completed in ?

A. ${\text{3}}\frac{3}{4}\,{\text{days}}$$
B. ${\text{3}}\frac{3}{7}\,{\text{days}}$$
C. ${\text{5}}\frac{5}{{47}}\,{\text{days}}$$
D. ${\text{4}}\frac{4}{9}\,{\text{days}}$$
Answer» D. ${\text{4}}\frac{4}{9}\,{\text{days}}$$


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