GAT Subject
Engineering
Computer Science Civil Engineering Chemical Engineering Agricultural Engineering Mechanical Engineering Electronics and Communication
12. | A can do piece of work in 30 days while B can do it in 40 days. In how many days can A and B working together do it ? | |
A. | 70 days | |
B. | 120/7 days | |
C. | 50 days | |
D. | 45 days | |