Question: A completes a work in 4 days whereas B completes the work in 6 days. C works 112 times as fast as A. How many

A completes a work in 4 days whereas B completes the work in 6 days. C works 112 times as fast as A. How many days it will take for the three together to complete the work ?
a. 712
b. 1512
c. 157
d. None of these

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