Question

# If $$5$$ men can build a wall in $$12$$ days. How many men can build it in $$10$$ days?

A
6
B
7
C
8
D
4

Solution

## The correct option is A $$6$$Let total work be W, and work done by 1 man in 1 day be w, then $$5\times w\times 12=W$$Also,$$x\times w\times 10=W$$ ( where x is number of men required to build the wall in 10 days)Equating both equations, we get,$$x\times w\times 10=5\times w\times 12$$$$\Rightarrow x\quad = \dfrac { 60 }{ 10 } =6\quad men$$Mathematics

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