A second's pendulum clock having steel wire is calibrated at 20°C . When temperature is increased to 30°C , then how much time does the clock loose or gain in one week ?

$\left[{\mathrm{\alpha }}_{\text{stoel }}=1.2\times {10}^{-5}{\left({ }^{\circ }\mathrm{C}\right)}^{-1}\right]$

• A

  0.3628s

• B

  3.626s

• C

  362.8 s

• D

  36.28s