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1. |
A can do $$\frac{1}{3}$$ rd of a work in 5 days and B can do the do $$\frac{2}{5}$$th of this work in 10 days. Both A and B, together can do the work in ? |
A. | ${\text{ 7}}\frac{3}{8}{\text{ days}}$$ |
B. | ${\text{8}}\frac{4}{5}{\text{ days}}$$ |
C. | ${\text{9}}\frac{3}{8}{\text{ days}}$$ |
D. | 0 days |
Answer» D. 0 days | |