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A smooth and bottomless tunnel is dug through the centre of earth .A particle is released from the surface of earth into the tunnel. Time to reach at a distance R/2 from the other end of tunnel is (appoximately) equal to (where R= radius of earth) (1) 56.4 minutes (3) 42.3 minute (2) 7.05 minutes (4) 28.2 minute

A smooth and bottomless tunnel is dug through the centre of earth .A particle is released from the surface of earth into the tunnel. Time to reach at a distance R/2 from the other end of tunnel is (appoximately) equal to (where R= radius of earth) 
(1) 56.4 minutes                            (3) 42.3 minute
(2) 7.05 minutes                            (4) 28.2 minute

Grade:12

1 Answers

Adarsh
768 Points
3 years ago
Dear Shivam,
i m getting 28.2 as answer , if it is correct then let me know i will explain you its process .
Thanks and Regards
Adarsh

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