P and Q can complete a work in 10 days and 6 days respectively. P alone started the work and Q joined him after 2 days till the completion of the work. How long did the work last?
Choose one:	A) 5 days	B) 10 days	C) 14 days	D) 22 days	E) 26 days
Explanation :   Work done by P in 1 day = 1/10   Work done by Q in 1 day = 1/6   Work done by P in 2 days = 2 Ã— (1/10) = 1/5   Remaining work = 1 â€“ 1/5 = 4/5   Work done by P and Q in 1 day = 1/10 + 1/6 = 4/15   Number of days P and Q take to complete the remaining work = (4/5) / (4/15)= 
<gadget id="calculator">(4/5) / (4/15)</gadget>
<output>3</output>
3   Total days= 2 + 3= 
<gadget id="calculator">2 + 3</gadget>
<output>5</output>
5   5 daysnswer : Option 5 days
<result>A</result>
P and Q can complete a work in 10 days and 6 days respectively. P alone started the work and Q joined him after 2 days till the completion of the work. How long did the work last?