if 6 women take an hour to dig a ditch, then how long should 18 women take a dig to ditch of the same type? Choose the correct choice from the following answers.
A) 25 min B) 20 min C) 28 min D) 15 min E) 10 min

Rationale: if 6 women take an hour to dig a ditch , then 18 men will take 6 * 60 / 18 = 20 mins to dig a ditch of the same type . answer : b
Answer: B