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A clock with a metallic pendulum 4 secon...

A clock with a metallic pendulum 4 second fast each day at a temperature of `20°C`. The koi efficient of linear expansion of given metal is `2.77xx10^(-5)°C^(-1)`. The temperature at which clock gives correct reading is nearly

A

`23°C`

B

`29°C`

C

`17°C`

D

`28°C`

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