If 20 men can build a wall 66 metres long in 12 days, what length of a similar can be built by 86 men in 8 days?	Select
A) 189.2 mtrs	B) 378.4 mtrs	C) 478.4 mtrs	D) 488.4 mtrs	E) 578.4 mtrs

Rationale: "if 20 men can build a wall 66 metres long in 12 days , length of a similar wall that can be built by 86 men in 8 days = ( 66 * 86 * 8 ) / ( 12 * 20 ) = 189.2 mtrs answer : a"
Answer: A