If 40 men build 4 buildings in 12 months how many men would be required to build 6 houses in 4 months​?

Answer: 180 men
Explanation

If 40 men can build 4 buildings in 12 months we can divide 4/12 which is 1/3..

40*3 is 120 men for 4 buildings and 120 is divided into 4 we get 30 men for 1 building..

so for buildings 30*2 = 60   

 120+60 is = 180

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