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# 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, $$3 × 10^8$$ m/s.

and speed of signal was $$3 × 10^8$$ m/s.
We know that, speed = $$Distance \over time$$ => distance = speed × time
So, Distance $$= 3×10^8 × 300 = 9 × 10^{10}$$ m