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Q.

Two satellites are revolving round the earth at different heights. The ratio of their orbital speeds is 2:1.If one of them is at a height of 100km, the height of the other satellite is(in km)

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a

19600

b

24600

c

29600

d

14600

answer is A.

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Detailed Solution

V0=GMR+h⇒V0α1R+h V1V2=R+h2R+h1⇒21=6400+h26400+100⇒41=6400+h26500⇒h2=26000-6400=19600km
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