Mathematics · Speed, Time and Distance
A radar system detects the reflected electromagnetic waves from an enemy aeroplane after a round-trip time interval of 0.02 × 10-3 seconds. If the velocity of the waves is 3 × 108 m/s, what is the distance of the aeroplane from the radar?
- 11.0 km
- 21.5 km
- 33.0 km✓
- 46.0 km
Correct answer
3.0 km
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