Question
Two absolute scales A and B have triple points of water defined to be 200 A and 350 B. What is the relation between Ta and Tb?
(1) Ta = Tb/2
(2) Ta = 7Tb/4
(3) Ta = 2Tb
(4) Ta = 4Tb/7
Joshi sir comment
273.15 K = 200 A
and 273.15 K = 350 B
so A = 273.15 K/200 and B = 273.15 K/350
so Ta A = TbB
or Ta/Tb = B/A = 200/350 = 4/7
so 4th option