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A can do a piece of work in 12 days and...

This question belongs to Arithmetic Ability Time And Work
Time and Work
?

A can do a piece of work in 12 days and B in 24 days. If they work together, in how many days will they finish the work ?

Answer & Solution
Correct Answer: Option B
Days     Eff.     Total work
     
A - 12   2  
    24
B - 12   1  
  3  
     

A and B together can finish the work
$$\eqalign{ & = \frac{{24}}{3} \cr & = 8{\text{ days}} \cr} $$
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