The length of mercury thread when it is at 0oC, 100oC and at an unknown temperature θ θ is 25mm, 225mm and 175mm respectively. The value of θ θ is

The length of mercury thread when it is at 0oC, 100oC and at an unknown temperature $\theta$ is 25mm, 225mm and 175mm respectively. The value of $\theta$ is

Answer Details

$\frac{\theta -0}{100-0}$ = $\frac{175-25}{225-25}$

$\theta$ = 75.0oC