A and B can together finish a work in 40days. They worked together for 10days and then B left. After another 15days, A finished the remaining work. In how many days A alone can finish the job?	Choose the correct choice from the following
A) 10	B) 25	C) 60	D) 30	E) 20
A+B 10days work = 10*1/40 +  10= 
<gadget id="calculator">+  10</gadget>
<output>10</output>
10*1/40= 1/4   Remaining work = 1-1/4 = 3/4   3/4 work is done by A in 15days   whole work will be done by A in 15*4/3= 
<gadget id="calculator">15*4/3</gadget>
<output>20</output>
20days   Answer is 20
<result>E</result>
A and B can together finish a work in 40days. They worked together for 10days and then B left. After another 15days, A finished the remaining work. In how many days A alone can finish the job?