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A stationary source of sound is emitting...

A stationary source of sound is emitting sound of frequency `500Hz`. Two observers `A` and `B` lying on the same line as the source, observe frequencies `480Hz` and `530 Hz` respectively. The velocity of `A` and `B` respectively are (in `m//s`), speed of sound `=300m//s`.

A

16, 14

B

12, 16

C

12, 18

D

8,18

Text Solution

Verified by Experts

The correct Answer is:
C
`f_A=((300-v_A)/(300))xx500 = 480`
`implies 15000 -50 v_A = 14400`
`implies v_A = 12m//s`
`f_B=((300+v_B)/(300))xx500 = 530`
`implies v_B+300 =318`
`impliesv_B=18m//s`
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