A train moves towards a stationery observer with speed 34 m/s. The train sounds a whistle and its frequency registered by the observer is . If the speed of the train is reduced to 17 m/s, the frequency registered is .if speed of sound is 340 m/s, then the ratio is : |
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(a) |
18/17 |
(b) |
19/18 |

(c) |
20/19 |
(d) |
21/20 |

A train moves towards a stationery observer with speed 34 m/s. The train sounds a whistle and its frequency registered by the observer is . If the speed of the train is reduced to 17 m/s, the frequency registered is .if speed of sound is 340 m/s, then the ratio is : |
|||

(a) |
18/17 |
(b) |
19/18 |

(c) |
20/19 |
(d) |
21/20 |

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