A is 30% more efficient than B. How much time will they working tog – McqOptions

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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
B.	13
C.	20 3/17
D.	None of these
Answer» C. 20 3/17

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