Alex can do a piece of in 120 days and peter can do same work in 180 days,both are working together for 30 days after that peter left the job. then in how many days Alex alone complete the remaining work? Choose the correct answer:	A) 17.5 DAYS	B) 25 DAYS	C) 15 DAYS	D) 12 DAYS	E) 30 DAYS
First take LCM of (120,180) = 3600; Total work =3600; Alex's one day work = 3600/120= 
<gadget id="calculator">3600/120</gadget>
<output>30</output>
30; peter's one day work=3600/180= 
<gadget id="calculator">3600/180</gadget>
<output>20</output>
20; One day work of both Alex+peter= 30+20= 
<gadget id="calculator">30+20</gadget>
<output>50</output>
50; Total work completed in 30 days= 30*50= 
<gadget id="calculator">30*50</gadget>
<output>1_500</output>
1500; remaining work is= 3600 - 1500= 
<gadget id="calculator">3600 - 1500</gadget>
<output>2_100</output>
2100; remaining work completed by Alex in= 2100/120= 
<gadget id="calculator">2100/120</gadget>
<output>35/2 = around 17.5</output>
17.5 days. 17.5 DAYSnswer=17.5 DAYS
<result>A</result>
Alex can do a piece of in 120 days and peter can do same work in 180 days,both are working together for 30 days after that peter left the job. then in how many days Alex alone complete the remaining work?