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A clock with an iron pendulum keeps corr...

A clock with an iron pendulum keeps correct time at `15^@C` . What will be the error, in seconds per day, if room temperature is `20^@C` (The co-eff.of linear expansion of iron is `0.000012//^@C`)

A

2.6 S

B

6.2 S

C

1.3 S

D

3.1 S

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The correct Answer is:
A
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