A and B complete a work in 6 days. A alone can do it in 10 days. If both together can do the work in how many days?
Answers:  A) 3.95 days  B) 4.95 days  C) 3.75 days  D) 2.50 days  E) 1.45 days
1/6 + 1/10 = 8/30 = 4/15   15/4= 
<gadget id="calculator">15/4</gadget>
<output>15/4 = around 3.75</output>
3.75 days   ANSWER:3.75 days
<result>C</result>
A and B complete a work in 6 days. A alone can do it in 10 days. If both together can do the work in how many days?