During an experiment, a signal from a spaceship reached the ground station in five minutes. What was the distance of the spaceship from the ground station? The signal travels at the speed of light, that is, 3 × 10^{8} ms^{-1}.

Given that, Speed = 3 × 10^{8} m/s

Time taken = 5 × 60 s = 300 s

We know that Distance = Speed × Time

= 3 × 10^{8} m/s × 300 s

→ Distance = 900 × 10^{8} m = 9 ×1011 m