Question 938388
Rate*Time=Distance
The rate is {{{52}}}{{{kph}}}
{{{D=R*t=52t}}}

So now substitute for the various {{{t}}} values.
I'll do the first one, you do the rest.
When {{{t=3}}}
{{{D=52(3)=156}}}{{{km}}}
It's that easy, do the others exactly this way.