Question

A car moves on straight horizontal road with speed v' towards a mountain, if speed of sound in air is v and frequency of horn of car is f. Find the beat frequency observed by driver.

Options : a) 3(f x v')/(v-v')

b) 6(f x v')/5(v-v')

c) 3(f x v')/(v-v')

d) (f x v')/(v-v')

:-> Correct answer is [a]​
Explanation?

Answer 1

Answer:

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