A machine can finish a work in 15days and 2nd machine can finish the work in 30days. 2nd machine worked for 10days and left the job. In how many days, A alone can finish the remaining work?
Choose the correct choice from the following options
A) 5days B) 6days C) 10days D) 12days E) 15days
2nd machine 10days work = 1/30*10 = 1/3   Remaining work = 1 - 1/3 = 2/3   now 1/15 work is done by 1st machine in 1day   2/3 work is done by 1 machine in 15*2/3= 
<gadget id="calculator">15*2/3</gadget>
<output>10</output>
10days.   Answer is 10days
<result>C</result>
A machine can finish a work in 15days and 2nd machine can finish the work in 30days. 2nd machine worked for 10days and left the job. In how many days, A alone can finish the remaining work?