Question

10. When will the numerical values of Fahrenheit thermometer be equal and
opposite to values on Celsius scale?
1) 14.43
2) 11.43
3) 18.43
4) 20.43​

Answer 1

The correct answer is option 2) 11.43

The relation between celsius and fahrenheit scale is,

⇒ $\frac{c}{100} = \frac{f-32}{180}$

Given values be equal and opposite to values

⇒ let us take reading of celsius be C , then the value of Fahrenheit = -C

then from the relation,

⇒ $\frac{C}{100} = \frac{-C - 32}{180}$

⇒ 180C = -100C -3200

⇒ 280C = -3200

⇒ C = -11.428 ≅ -11.43

HOPE THIS HELPS YOU !!     : )