A WORKS TWICE AS FAST AS B. IF B CAN COMPLETE A WORK IN 4 DAYS INDEPENDENTLY, THE NUMBER OF DAYS IN WHICH A AND B CAN TOGETHER FINISH THE WORK IS:  Pick.
A) 1/2 DAYS	B) 3/4 DAYS	C) 1/4 DAYS	D) 4/3 DAYS	E) NONE OF THESE
RATIO OF RATES OF WORKING OF A AND B = 2:1. SO, RATIO OF TIME TAKEN = 1:2   A'S 1 DAY'S WORK = 1/2, B'S 1 DAY'S WORK = 1/4   (A+B)'S 1 DAY'S WORK = (1/2+1/4)=3/4=4/3   SO, A AND B TOGETHER CAN FINISH THE WORK IN 4/3 DAYS.   CORRECT OPTION: 4/3 DAYS
<result>D</result>
A WORKS TWICE AS FAST AS B. IF B CAN COMPLETE A WORK IN 4 DAYS INDEPENDENTLY, THE NUMBER OF DAYS IN WHICH A AND B CAN TOGETHER FINISH THE WORK IS: