A fax message is to be sent from Delhi to Washington \( P \) via a ...

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A fax message is to be sent from Delhi to Washington
\( P \) via a geostationary satellite. The minimum distance

W between the dispatch and its getting received is (Take height of the geostationary satellite \( =36000 \mathrm{~km} \) )
(a) \( 72 \times 10^{3} \mathrm{~km} \)
(b) \( 12 \times 10^{3} \mathrm{~km} \)
(c) \( 27 \times 10^{3} \mathrm{~km} \)
(d) \( 18 \times 10^{3} \mathrm{~km} \)
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