Question 95002
This is a variation on the distance equation, represented as
{{{ rate=distance/time }}}

In this scenario we're going to calculate time so the same equation should be rewritten as:
{{{ time=distance/rate }}}
or
{{{ t=d/t }}}

distance (d)= 175
rate (r) = 50

{{{ t=175/50 }}}
t=3.5

The trip will take 3.5 hours.

If you want to do a check, just plug in your values to the rate equation.
{{{ r=d/t }}}
{{{ r=175/3.5 }}}
{{{ r=50 }}}