radar sends a single to an aircrafts at a distance of 30km away and receives it back after 2×10-⁴ second. What is the speed of the signal
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Time taken = 2×10⁻⁴ s
Distance travelled = 30+30
= 60km (It has to travel the distance twice to return back)
= 60000m
Velocity = Distance travelled/Time taken
= 60000/2×10⁻⁴
= 3×10⁸ m/s
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