David and ANDREW can finish the work 12 days if they work together. They worked together for 8 days and then ANDREW left. David finished the remaining work in another 8 days. In how many days David alone can finish the work? Choose the correct choice from the following answers.
A) 30 days	B) 60 days	C) 70 days	D) 80 days	E) 24 days
Amount of work done by David and ANDR24 daysW in 1 day = 1/12   Amount of work done by David and ANDR24 daysW in 8 days = 8 Ã— (1/12) = 2/3   Remaining work â€“ 1 â€“ 2/3 = 1/3   David completes 1/3 work in 8 days   Amount of work David can do in 1 day = (1/3)/8 = 1/24   =&gt; David can complete the work in 24 days   Answer : 24 days
<result>E</result>
David and ANDREW can finish the work 12 days if they work together. They worked together for 8 days and then ANDREW left. David finished the remaining work in another 8 days. In how many days David alone can finish the work?