Question

An engine running at speed $\frac{V}{10}$ sounds a whistle of frequency 600 Hz. A passenger in a train coming from the opposite side at speed $\frac{V}{15}$ experiences this whistle to be of frequency f. If V is speed of sound in air and there is no wind, f is near to
(a) 710 Hz
(b) 630 Hz
(c) 580 Hz
(d) 510 Hz

Answer 1

$<b>$

Option B is Correct

Answer 2

If V is speed of sound in air and there is no wind, f is near to
630 Hz