Question

a thermometer with an arbitrary scale, s, of equal division registers -30°S at the ice point and 90°S at the steam point. Calculate the celsius temperature corresponding to 60°S

Answer 1

Relationship between C and S scale

$\frac{C}{100}=\frac{S+30}{120}$

$C=\frac{5(S+30)}{6}=75^°$ C