If 20 men can build a wall 112 metres long in 6 days, what length of a similar wall can be built by 15 men in 3 days? Choose the most appropriate option
A) 65mtr. B) 52mtr C) 70mtr. D) 78mtr. E) 42mtr.
20 men is 6 days can build 112 metres   15 men in 3 days can build = 112*(15/20)x(3/6)   = 42 meters   Answer: 42mtr..
<result>E</result>
If 20 men can build a wall 112 metres long in 6 days, what length of a similar wall can be built by 15 men in 3 days?