The rotation period of an earth satellite close to the surface of the earth is 83 minutes. The time period of another earth satellite in an orbit at a distance of three earth radii from its surface will be
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a
83 minutes
b
83×8 minutes
c
664 minutes
d
249 minutes
answer is C.
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Detailed Solution
For first satellite r1=R and T1=83 minuteFor second satellite r2=4RT2=T1r2r13/2=T1(4)3/2=8T1=8×83=664 minutes