A can do a piece of work in 20 days, B can do a piece of work in 12 days,both are working together for 3 days after A left the job,then how many days B requires to complete the remaining work?  Answers:	A) 6 Days	B) 5 Days	C) 3 Days	D) 7 Days	E) 12 Days
First take L3 DaysM of (20,12) = 60; Total work = 60; A's one day work = 60/20= 
<gadget id="calculator">60/20</gadget>
<output>3</output>
3; B's one day work=60/12= 
<gadget id="calculator">60/12</gadget>
<output>5</output>
5; One day work of both A+B= 3+5= 
<gadget id="calculator">3+5</gadget>
<output>8</output>
8; Total work completed in 3 days= 8*3= 
<gadget id="calculator">8*3</gadget>
<output>24</output>
24; remaining work is= 60 - 24= 
<gadget id="calculator">60 - 24</gadget>
<output>36</output>
36; remaining work completed by B in= 36/12= 
<gadget id="calculator">36/12</gadget>
<output>3</output>
3 days.Answer=3 Days
<result>C</result>
A can do a piece of work in 20 days, B can do a piece of work in 12 days,both are working together for 3 days after A left the job,then how many days B requires to complete the remaining work?