Test Academy | A particle would take a time t to move down a straight tunnel from the surface of earth (supposed to be a homogeneous sphere) to its centre. If gravity were to remain constant this time would be t'. The ratio of t /t' will be π/2√2, π/2, 2π/3, π/√3

Question

A particle would take a time t to move down a straight tunnel from the surface of earth (supposed to be a homogeneous sphere) to its centre. If gravity were to remain constant this time would be t'. The ratio of t /t' will be

Options :

π/2√2
π/2
2π/3
π/√3

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