10 men can cut 10 trees in 2 hours. If 2men leave the job, how many trees will be cut in 3 hours?  Pick.
A) 12  B) 15  C) 16  D) 18  E) 20

Rationale: 10 men - working 2 hrs - cut 10 trees 1 men - working 1 hr - cuts = 10 / 10 * 2 thus 8 men - working 3 hrs - cut = 10 * 8 * 3 / 10 * 2 = 12 trees answer is a
Answer: A