If it takes 70 workers 3 hours to disassemble the exhibition rides at a small amusement park, how many hours would it take 30 workers to do this same job?  Choose one: A) 40 / 3 B) 11 C) 7 D) 7 / 3 E) 9 / 7

Rationale: 70 workers = 3 hours then , 1 worker = 3 * 70 hours 30 workers = ( 3 * 70 ) / ( 30 ) = 7 answer : c
Answer: C