1.

A can do a certain work in 12 days. B is 60% more efficient then A. How many days will B and A together take to do the same job?

A. $\frac{{80}}{{13}}{\text{days}}$$
B. $\frac{{70}}{{13}}{\text{days}}$$
C. $\frac{{75}}{{13}}{\text{days}}$$
D. $\frac{{60}}{{13}}{\text{days}}$$
Answer» E.


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