Answer:
45 minutes or can be also 0.75 hours
Step-by-step explanation:
per hours refers to 1 hours.
40 km ---> 1 hours
1 km ---> 1/40 hours
30 km ---> { ( [tex]\frac{1}{40}[/tex] ) * 30} hours
--> 0.75 hours
Conversion: 0.75 * 60 minutes
: 45 minutes
