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A pendulum clock ( fitted with a small ...

A pendulum clock ( fitted with a small heavy bob that is connected with a metal rod ) is 3 seconds fast each day at a temperature of `15^(@)C` and 2 seconds slow at a temperature of `30^(@)C`. Find the temperature ( in `""^(@)C` ) at which will show the correct time.

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The correct Answer is:
`24.00^@C`
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