If 20 men can build a wall 66 metres long in 6 days, what length of a similar can be built by 86 men in 8 days?
Choose the correct choice:
A) 278.4 mtrs  B) 378.4 mtrs  C) 478.4 mtrs  D) 488.4 mtrs  E) 578.4 mtrs
If 20 men can build a wall 66 metres long in 6 days,   length of a similar wall that can be built by 86 men in 8 days = (66*86*8)/(6*20) = 11*172/5 = 1892/5= 
<gadget id="calculator">1892/5</gadget>
<output>1_892/5 = around 378.4</output>
378.4 mtrs   ANSWER:378.4 mtrs
<result>B</result>
If 20 men can build a wall 66 metres long in 6 days, what length of a similar can be built by 86 men in 8 days?