1. The problem statement, all variables and given/known data A helicopter flies directly toward a vertical cliff. when the helicopter is 700 m from the cliff face it transmits a sonar signal. it recives the reflected signal 3.4 s later. if the signal travels at a wind speed 350m/s, what is the speed of the helicopter. 3. The attempt at a solution 250*3.4= 1190 m plz help me what i need to do next? i spend 1 hour on it i did n't get answer.