question_answer

If m men can do a job in p days, then \[(m+r)\]men can do the job in how many days?

A)  \[(p+r)\]                       

B)  \[\frac{mp}{m+r}\]

C)  \[\frac{p}{m+r}\]                     

D)  \[\frac{m+r}{p}\]

Correct Answer: B

Solution :

\[\therefore \]      \[\frac{x}{p}=\frac{m}{m+r}\] \[\Rightarrow \]\[x=\frac{mp}{m+r}\]days