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How long would it take a radio wave of frequency
P \( 6 \times 10^{3} \mathrm{~s}^{-1} \) to travel from mars to the earth, a

W distance of \( 8 \times 10^{7} \mathrm{~km} \)
(A) \( 1.5 \times 10^{2} \mathrm{~s} \)
(B) \( 2.66 \times 10^{2} \mathrm{~s} \)
(C) \( 2.66 \times 10^{-2} \mathrm{~s} \)
(D) none of these
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