A IS TWICE AS GOOD A WORKMAN AS B AND TOGETHER THEY FINISH A PIECE OF WORK IN 14 DAYS. THE NUMBER OF DAYS TAKEN BY A ALONE TO FINISH THE WORK IS:
Pick one:
A) 11	B) 21	C) 28	D) 42	E) NONE OF THESE
(A'S 1 DAY'S WORK): (B'S 1 DAY'S WORK)=2:1   (A+B)'S 1 DAY'S WORK = 1/14   DIVIDE 1/14 IN THE RATIO 2:1   A'S 1 DAY'S WORK = (1/14x2/3)=1/21   HENCE, A ALONE CAN FINISH THE WORK IN 21 DAYS.   CORRECT OPTION : 21
<result>B</result>
A IS TWICE AS GOOD A WORKMAN AS B AND TOGETHER THEY FINISH A PIECE OF WORK IN 14 DAYS. THE NUMBER OF DAYS TAKEN BY A ALONE TO FINISH THE WORK IS: