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An ideal liquid having length of liquid...

An ideal liquid having length of liquid column l is column in V-shape take as shown. If liquid is displaced, then its time period is

A

a. `T = 2pi sqrt((l)/(g(cos beta+cos alpha)))`

B

b. `T = 2pi sqrt((l)/(g(sin beta+cos alpha)))`

C

c. `T = 2pi sqrt((l)/(g(sin alpha+sin beta)))`

D

d. `T = 2pi sqrt((l)/(g(sin alpha+cos beta)))`

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