Question 887113

if jon can paint a fence in 3 hours and karen can paint it in 6 hours , find how long it takes them to paint it together. 
<pre>
{{{1/3 + 1/6 = 1/T}}}
2T + T = 6 ------ Multiplying by LCD, 6T
3T = 6
T, or time taken by both, working together = {{{6/3}}}, or {{{highlight_green(highlight_green(2))}}} hours