A man takes 10 hours to walk to a place and ride back. If he walk both the ways he needs 4 hours more. How long would he have take to ride both ways?

 Time taken in walking one way $+$riding other way

$W+R=10hrs\to 1$

Time taken in walking both ways $=4hrsmore$

$W+W=14hrs$

$2W=14\Rightarrow W=7hrs$

$7+R=10\Rightarrow R=3$

$Ridebothways=2\times R=6hrs$