#### Question

A radar sends a signal to an aircraft at a distance of 30 km away and receives it back after 2 x 10^{-4} seconds. What is the speed of the signal?

#### Solution

Given t =2 x10^{-4}

d = 30 km = 30 x 10^{3} m

Speed of the signal = ?

Let ‘d’ be the distance of aircraft from the radar, then the total distance travelled by the wave in coming and going back = 2 d.

`"Velocity of wave, V"=("Total distance travelled, 2d")/"Time taken, t"`

`=(2xx30xx10^3)/(2xx10^-4)`

`=3xx10^8 `m/s

Is there an error in this question or solution?

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A Radar Sends a Signal to an Aircraft at a Distance of 30 Km Away and Receives It Back After 2 X 10^-4 Second. What is the Speed of the Signal? Concept: Concept of Sound Numericals.

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