Answer:
Given \[T=0.1ms=0.1\times {{10}^{3}}s.\] \[\lambda =5cm,\text{ }v=?\] We know, \[\lambda =5cm,\] \[V=\frac{\lambda }{T}=\frac{5}{0.1\times {{10}^{-3}}}=50,000\,m/s\]
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