Q.

A sound wave of frequency 500 Hz covers a distance of 1000 m in 5 second between the points X and Y. Then the number of waves between X and Y is:

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a

500

b

1000

c

2500

d

5000

answer is C.

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Detailed Solution

V = 10005 = 200 m/s

        v =     λ = Vn = 2000500

No. of waves = Lλ1000×500200 = 2500

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