In a mercury rhermometer the ice point (lower fixed point) is marked as 10^(@) and the steam point (upper fixed point ) is marked as 130^(@). At 40^(@)C tmperature, what will this thermometer read?

In a mercury rhermometer the ice point (lower fixed point) is marked a

1.	In a mercury rhermometer the ice point (lower fixed point) is marked as 10^(@) and the steam point (upper fixed point ) is marked as 130^(@). At 40^(@)C tmperature, what will this thermometer read?
Answer» `78^(@)` `66^(@)` `62^(@)` `58^(@)` Solution :Using `(T_(c)-0)/(100-0)=(T-10)/(130-10)` `(40-100)/(100-0)=(T-10)/(130-10)` `""(40)/(100)=(T-10)/(120)or 2/5=(T-10)/(120)` `""5T-50=240rArr5T=290` `rArr""T=(290)/5=58^(@)`