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ICSE Class 10 Answered

Radar sends a signal to an aeroplane at a distance 45km away with a speed of 3*10 to the Power of 8 m/s.after how long is the signal received back from the aeroplane
Asked by Rakhisumam | 28 Nov, 2018, 10:30: AM
answered-by-expert Expert Answer
time = distance/speed
 
we have distance = 90 km ( signal has to travel from transmitter to target then return back to transmitter )
speed = 3×108 m/s
 
time = (90×1000)/( 3 × 108) = 30×10-5 s = 300 μs
Answered by Thiyagarajan K | 28 Nov, 2018, 11:24: AM

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