Question 426915
You need an answer in km/hr, so you must covert 1 hour and 45 minutes to hours
To convert minutes to hours, the units are:
(minutes) x (hours/minute) = hours
Plugging in numbers:
{{{ 45*(1/60) = 3/4 }}}, so there are {{{3/4}}} hours in {{{45}}} minutes
Speed is (distance) / (time)
{{{ 42 / (1 + 3/4)}}} km/hr
{{{ 42 / 1.75}}} km/hr
{{{ 24 }}} km/hr