A is 30% 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 is 30% more efficient than B. How much time will they, working toge

1.	A is 30% 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.	15 days
D.	20 days
Answer» C. 15 days

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A is 30% 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?

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