Aptitude and Reasoning

Six men complete a piece of work in 32 hours. In how many hours will 16 men complete the same piece of work?

A. 18                               B. 16

C. 12                               D. 24

Rathika can complete a piece of work in 15 days and Asha can complete the same piece of work in 24 days. In approximately, how many days can Rathika and Asha together complete the same piece of work?

A. 6 days                        B. 4 days

C. 9 days                        D. 7 days