The distance from Earth to Mars is 0.522 astronomical units. How long does it take for a spacecraft to fly from Earth to Mars if it moves at a speed of 12 km / s?
Astronomical unit – a unit of measurement for distances in astronomy; equal to the average distance from the Earth to the Sun (149.6 million km).
Distance from Earth to Mars = 0.522 × 149,600,000 km = 78,091,200 km
The flight time is determined by the formula: t = S / V
t = 78 091 200 km: 12 km / s = 6 507 600 s = 108 460 min = 1 807 h 40 min = 75 days 7 h 40 min.
Answer: 75 days 7 hours 40 minutes.
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