Question

# $$15$$ men can build a wall in $$60$$ days. How many more men are required to build another wall of same size in $$45$$ days?

A
2 men
B
7 men
C
5 men
D
3 men

Solution

## The correct option is C $$5$$ menLet $$x$$ men are required to build the wall in $$45$$ days.Then $$x:15::60:45$$$$\Rightarrow 45x=15\times 60$$$$\Rightarrow x=\dfrac{15\times 60}{45}$$$$x=20$$ men.Hence, $$20-15=5$$ more men are required.Mathematics

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