A can finish a work in 4 days and B can do same work in half the time taken by A. then working together, what part of same work they can finish in a day?  Answers
A) 1/4	B) 1/6	C) 1/7	D) 3/4	E) None of these
Explanation:   Please note in this question, we need to answer part of work for a day rather than complete work. It was worth mentioning here because many do mistake at this point in hurry to solve the question   So lets solve now,   A's 1 day work = 1/4   B's 1 day work = 1/2 [because B take half the time than A]   (A+B)'s one day work =   (1/4+1/2)=3/4   So in one day 3/4 work will be done   Answer: 3/4
<result>D</result>
A can finish a work in 4 days and B can do same work in half the time taken by A. then working together, what part of same work they can finish in a day?