Question 508746
{{{Speed=Dist/time}}}
So Speed * Time= Distance
Let t be time for Anderson.
The t-30 be time for Quentins

So 
Convert 30 mins to hours as the speed is miles/hr.

 
{{{50t= 65(t-0.5)}}}
{{{50t=65t-32.5}}}
{{{50t-65t=-32.5}}}
{{{-15t=-32.5}}}
{{{t=2.1667}}}


it will take Quentins :-
{{{t-0.5=2.1677-0.5=1.66666667}}} hours