Some persons can do a piece of work in 12 days. Two times the number of such persons will do half of that work in Choose the correct answer.
A) 7 days  B) 7 days  C) 9 days  D) 3 days  E) 2 days
Explanation:   Let x men can do the in 12 days and the required number of days be z   More men, Less days [Indirect Proportion]   Less work, Less days [3 daysirect Proportion ]   Answer: 3 days
<result>D</result>
Some persons can do a piece of work in 12 days. Two times the number of such persons will do half of that work in