A and B can complete a task in seven days if they work together. A has a 13/4 efficiency advantage over B. A may complete the same task by herself in :
A. 9 1/3days
B. 11 days
C. 12 1/4days
D. 16 1/3days
Answer:B
A and B can complete a task in seven days if they work together. A has a 13/4 efficiency advantage over B. A may complete the same task by herself in :
A. 9 1/3days B. 11 days C. 12 1/4days D. 16 1/3days