It would take approximately 315 hours to go to the astronaut
Solution:
Given that, astronaut travels 1221 km/h to the moon
The moon is 384,400 km away
To find: time taken for the astronaut to go to the moon
From given information,
speed = 1221 km/hr
distance = 384400 km
The formula for time is given as:

Substituting the given values,

Thus it would take approximately 315 hours to go to the astronaut