54 men working 8 hours per day dig 30 m deep. How many extra men should be put to dig to a depth of 50 m working 6 hours per day?  Choose the correct choice from the following answers.
A) 33	B) 66	C) 18	D) 100	E) 281

Rationale: "( 54 * 8 ) / 30 = ( x * 6 ) / 50 = > x = 120 120 – 54 = 66 answer : b"
Answer: B