A U-tube contains a non-viscous liquid up to a height of 20 cm in each of the column. It is pressed in one of the columns and then released. The liquid executes a S.H.M. of period :

Options

A. 0.89 s
B. 2.89 s
C. 2.13 s
D. none of the above.

Answer

A

Explanation

`T=2pi sqrt((h)/(g))`
`implies T=2pi sqrt((20)/(980))`
`T=0.89" s".`
So correct choice is (a).