During the fall, the monarch butterfly migrates some 3500 km from the Nord-Eastern of the United States to Mexico.
Guess the speed of the butterfly and estimate how long it takes to make his trip
Some sientific facts on the migrating speed of the Monarch butterfly can be found if you click here
Cruise speed of the Monarch butterfly is estimated at 18 km/h, but the average speed during his migration is calculated to be 9 km/h
They fly only at daylight and in fall the mean daylight in California is 10 hours.
Distance $s = 3500 km$
Time $t = \frac{s}{v}$
Average speed $v = 9$ km/h
Distance = 3500 # in km
Speed_km_h = 9 # in km/h
Time_h = Distance / Speed_km_h
# limit to 2 significant figures as distance is given in 2 significants too
print(f'The time for this migration is {Time_h:.0f} hours')
Time_d = Time_h / 10
print(f'The time for this migration in days is {Time_d:.0f} days at a mean of 10 hours a day.')