A WORKS TWICE AS FAST AS B. IF B CAN COMPLETE A WORK IN 20DAYS INDEPENDENTLY, THE NUMBER OF DAYS IN WHICH A AND B CAN TOGETHER FINISH THE WORK IS:
Choose the correct choice from the following choices:
A) 40/3 DAYS B) 10/3 DAYS C) 20/3 DAYS D) 3/20 DAYS E) 3/10 DAYS
RATIO OF RATES OF WORKING OF A AND B = 2:1. SO, RATIO OF TIME TAKEN = 1:2   A'S 1 DAY'S WORK = 1/10, B'S 1 DAY'S WORK = 1/20   (A+B)'S 1 DAY'S WORK = (1/10+1/20)=3/20=20/3   SO, A AND B TOGETHER CAN FINISH THE WORK IN 20/3 DAYS.   20/3 DAYSORRE20/3 DAYST OPTION: 20/3 DAYS
<result>C</result>
A WORKS TWICE AS FAST AS B. IF B CAN COMPLETE A WORK IN 20DAYS INDEPENDENTLY, THE NUMBER OF DAYS IN WHICH A AND B CAN TOGETHER FINISH THE WORK IS: