Question 1195345

Let "{{{t}}}" be the time after Dawn left the library.

Tara’s time at that moment is {{{t+3 }}}

Dawn will catch up with Tara when the distance is same.

{{{14(mil/h)*t=8(mil/h)(t+3)}}}

{{{14t=8(t+3)}}}
{{{14t=8t+24}}}
{{{14t-8t=24}}}
{{{6t=24}}}
{{{t=4}}}

Dawn will catch up with Tara in {{{4}}} hours.