Question

A printer can complete a printing work in 9 hours, while another printer can do it in 12 hours. If they work together for 4 hours, what fraction of the work will be completed?

• A. $\frac{2}{9}$
• B. $\frac{2}{3}$
• C. $\frac{1}{3}$
• D. $\frac{7}{9}$

Answer 1

Answer: (D)

$\frac{7}{9}$

Answer 2

The correct option is (D): $\frac{7}{9}$