Question

at what temperature will reumer thermometer show same reading as fahrenheit thermometer

Answer 1

we know,
( R - 0 )/ 80 = ( F -32)/ 180

according to question ,

R = F

so,

(R -0)/80 = ( R -32)/180

R/4 = ( R -32)/9

9R = 4R - 128

5R = -128

R = -25.6

hence, at -25.6 reumer reading equal to Fahrenheit .