A can finish a work in 10 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? Choose the correct choice from the following answers:
A) 1/5 B) 1/6 C) 1/7 D) 3/10 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 = 1/10   B's 1 day work = 1/5 [because B take half the time than A]   (A+B)'s one day work =   (1/10+1/5)=3/10   So in one day 3/10 work will be done   Answer: 3/10
<result>D</result>
A can finish a work in 10 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?