Question 947330
Traveled how long for 6 minutes?
You never provided a number. 
Let's call this number, N.
Then,
6 is to N as 20 is to X, where X is the value you seek.
{{{6/N=20/X}}}
{{{6X=20N}}}
{{{X=(20/6)N}}}
{{{X=(10/3)N}}}