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Physics
Two temperature scales A and B are related by (A-42/110)=(B-72/220). At which temperature two scales have the same reading ?
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Q. Two temperature scales $A$ and $B$ are related by $\frac{A-42}{110}=\frac{B-72}{220}$. At which temperature two scales have the same reading ?
WBJEE
WBJEE 2011
Thermal Properties of Matter
A
$-42^{0}$
0%
B
$-72^{0}$
0%
C
$+12^{0}$
100%
D
$-40^{0}$
0%
Solution:
We are given the relation between the temperature scales $A$ and $B$ as $\frac{A-42}{110}=\frac{B-72}{220}$, so for the two scales to have the same reading $A=B$ and so $\frac{A-42}{110}=\frac{A-72}{220}$, which yields $A=12$.