A and B can together finish a work in 40days. They worked together for 10days and then B left. After another 12days, A finished the remaining work. In how many days A alone can finish the job?	Pick one
A) 10
B) 25
C) 60
D) 16
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 12 days   whole work will be done by A in  12*4/3= 
<gadget id="calculator"> 12*4/3</gadget>
<output>16</output>
16days   Answer is 16
<result>D</result>
A and B can together finish a work in 40days. They worked together for 10days and then B left. After another 12days, A finished the remaining work. In how many days A alone can finish the job?