A is more efficient than B. How much time will they, working together, take to complete a job which A alone could have done in 23 days?
A. 11 days
B. 13 days
C. days
D. None of these
Answer:B
A is more efficient than B. How much time will they, working together, take to complete a job which A alone could have done in 23 days?
A. 11 days B. 13 days C. days D. None of these