Thank you for reporting, we will resolve it shortly
Q.
The radio transmitter operates on a wavelength of $1500\, m.$ The frequency corresponding to this wavelength will be:
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Solution:
Wavelength of radio transmitter
$\lambda=1500\, m$
The frequency of radio transmitter is
$n =\frac{c}{\lambda}=\frac{3 \times 10^{8}}{1500}$
$=200 \times 10^{3}=200\, kHz$