A and B complete a work in 5 days. A alone can do it in 10 days. If both together can do the work in how many days? Choose the most appropriate option:
A) 3.33 days	B) 3.99 days	C) 2.99 days	D) 2.98 days	E) 2.44 days
1/5 + 1/10 = 3/10   10/3 = 3.33 days   3.33 daysnswer: 3.33 days
<result>A</result>
A and B complete a work in 5 days. A alone can do it in 10 days. If both together can do the work in how many days?