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How can find out the time taken to reach r/2 from the other end of tunnel . Please answer quickly with explanation

How can find out the time taken to reach r/2 from the other end of tunnel . Please answer quickly with explanation

Question Image
Grade:12

1 Answers

Adarsh
768 Points
3 years ago
we can find it by using simple mechanics . earth radius is 6400km so we will find time to caver a distance of 6400 km under an acceleration of 9.8m/s2 then we will add this time to the time taken to cover a distance of 3200 km under retardation of 9.8m/s2 then we will get 28.2 min as answer..
i hope this will help you ..
thanks and regards
Adarsh

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