Two cylinders of same cross-section and ...

Two cylinders of same cross-section and length L but made of two different materials of densities `d_(1)` and `d_(2)` are cemented together to from a cylinder of length 2L. The combination floats in a liquid of density `d " " d_(1) lt d_(2)` then

`d_(1) lt (3)/(4)d`

`(d)/(2) gt d_(1)`

`(d)/(4) gt d_(1)`

`d lt d_(1)`

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