A) \[60\,km\]
B) \[100\,km\]
C) \[50\,km\]
D) \[55\,km\]
Correct Answer: D
Solution :
[d] Here \[R=6.4\times {{10}^{6}}m,\] \[h=240\,m,\] so, required distance \[d=\sqrt{2Rh}=\sqrt{2\times 6.4\times {{10}^{6}}\times 240}\] \[=55\times {{10}^{3}}m\] \[=55\,km\]
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