Question

A can complete a work in 12 days and B in 18 days. In how many days will they complete the work together?

• A. 6 days
• B. 7.2 days
• C. 8 days
• D. 9 days

Hint:

For two people, you can use the formula: $\text{Time} = \frac{xy}{x+y}$. In this case: $\frac{12 \times 18}{12 + 18} = \frac{216}{30} = 7.2$.

Answer 1

The Correct Option is B