Question 400589
With just units:
(inches/hour) x (feet/inch) x (miles/feet) x (hours/minute)
given:
{{{30}}} inches/hour x {{{1/12}}} feet/inch x {{{1/5280}}} miles/feet x {{{1/60}}} hours/minute
{{{30 / (12*5280*60)}}}
{{{30/3801600 = 7.8914*10^(-6)}}} miles/minute