1.

The ratio of the height of the mountain and the depth of a mine, if a pendulum swings with the same period at the top of the mountain and at the bottom of the mine isA. `1 : 1`B. `1 : 2`C. `2 : 1`D. `4 : 1`

Answer» Correct Answer - B
`T_(n)=T_(d)`
`2pisqrt((l)/(g_(h)))=2pisqrt((l)/(g_(d)))`
`g_(h)=g_(d)`
`1-(2h)/(R)=1-(d)/(R)`
`2h=d`
`(h)/(d)=(1)/(2)`


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