A U-tube of base length l filled with th...

A `U`-tube of base length `l` filled with the same volume of two liquids of densities `rho` and `2rho` is moving with an acceleration `'a'` on the horizontal plane. If the height difference between the two surfaces (open to atmosphere) becomes zero, then the height `h` is given by

`(aL)/(2g)`

`(3 aL)/(2g)`

`(aL)/g`

`(2aL)/(3g)`

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