69. If A and B work together , they will complete a job in 7.5 days. However , if A world alone and completes half the job and then B takes over and completes the remaining half alone, they will be able to complete the job in 20 days. How long B alone take to do the job if A is more efficient than B

69. If A and B work together , they will complete a job in 7.5 days. H

1.	69. If A and B work together , they will complete a job in 7.5 days. However , if A world alone and completes half the job and then B takes over and completes the remaining half alone, they will be able to complete the job in 20 days. How long B alone take to do the job if A is more efficient than B
Answer» 69. If A and B work together , they will complete a job in 7.5 days. However , if A world alone and completes half the job and then B takes over and completes the remaining half alone, they will be able to complete the job in 20 days. How long B alone take to do the job if A is more efficient than B

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