Final answer:
The speed at which the satellite travels in its circular orbit around the Earth is 3,000 m/s.
Step-by-step explanation:
In order to find the speed at which the satellite travels, we can use the formula:
v = 2πr / T
where v is the velocity of the satellite, r is the radius of the orbit, and T is the period of the satellite. Substituting the given values into the formula, we have:
v = (2π × 6,370,000) / (1.26 × 10^4) = 3,000 m/s
Therefore, the speed at which the satellite travels is 3,000 m/s.