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A falcon and its trainer are exactly midway between two vertical & parallel hills. As the trainer fires the gun, the falcon starts flying directly towards one of the hills. The falcon hears first and second echoes of the gun-shot at 2 s and 3 s respectively Ignore reflection of sound from the falcon and from the trainer. The air is practically still. Among the following options, respective speeds of the falcon and the sound (in m/s) could be _________ . 

(a) 85 & 340 

(b) 68 & 340 

(c) 50 & 350 

(d) 40 & 360

1 Answer

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Best answer

Correct option: (b) 68 & 340

Explanation:

That means velocity of sound is five times of velocity of sound so option (b) is correct.

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