A takes twice as much time as B or thrice as much time to finish a piece of work.Working together they can finish the work in 2 days.B can do the work alone in:
Choose the correct answer:
A) 5 hours
B) 6 hours
C) 7 hours
D) 8 hours
E) 4 hours
Let 6 hours takes =x hours   A takes=x/2   1/x + 1/(x/2)=1/2   3/x=1/2   x = 6 hours   ANSWER:6 hours
<result>B</result>
A takes twice as much time as B or thrice as much time to finish a piece of work.Working together they can finish the work in 2 days.B can do the work alone in: