SATHEE: Wave Motion 5 Question 8

Wave Motion 5 Question 8

8. The speed of sound of the whistle is

(2007, 4M)

(a) $340 m / s$ for passengers in $A$ and $310 m / s$ for passengers in $B$

(b) $360 m / s$ for passengers in $A$ and $310 m / s$ for passengers in $B$

(c) $310 m / s$ for passengers in $A$ and $360 m / s$ for passengers in $B$

(d) $340 m / s$ for passengers in both the trains

Show Answer

Answer:

Correct Answer: 8. (b)

Solution:

$\begin{aligned} v_{S A} = 340 + 20 = 360 m / s \\ v_{S B} = 340 - 30 = 310 m / s \end{aligned}$

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