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
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Answer:
Correct Answer: 8. (b)
Solution:
$$ \begin{aligned} & v _{S A}=340+20=360 m / s \\ & v _{S B}=340-30=310 m / s \end{aligned} $$
