If 20 men can build a wall 66 metres long in 4 days, what length of a similar can be built by 86 men in 8 days?	Choose the correct answer.
A) 278.4 mtrs	B) 378.4 mtrs	C) 478.4 mtrs	D) 488.4 mtrs	E) 567.6 mtrs

Rationale: "if 20 men can build a wall 66 metres long in 4 days , length of a similar wall that can be built by 86 men in 8 days = ( 66 * 86 * 8 ) / ( 4 * 20 ) = 567.6 mtrs answer : e"
Answer: E