The lower and upper fixed points marked on a Mercury-in-glass thermometer are 210mm. The end of the mercury column in the tube is 49mm above the lower fixed...

Answer Details

The temperature of the room in degrees Celsius is 30.43°C.
A Mercury-in-glass thermometer works by measuring the expansion of mercury in a glass tube as the temperature increases. The lower fixed point is typically the point where the mercury is at its minimum and the upper fixed point is where the mercury is at its maximum. In this case, the lower fixed point is at 0°C and the upper fixed point is at 30°C, and the mercury is 210mm above the lower fixed point. So, the temperature of the room must be 30.43°C.