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?
A) -42${^\circ}$C
B) -72${^\circ}$C
C) 12${^\circ}$C
D) 40${^\circ}$C
Explanation
(c) $\frac{A - 42}{110}\ = \frac{B - 72}{220}$
$\frac{A - 42}{110} = \frac{A - 72}{220}$
2A$-$84=A$-$72
A=12
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.