Question

A centigrade and a Fahrenheit thermometer are dipped in boiling water. The water temperature is lowered until the Fahrenheit thermometer registers 140°. What is the fall in temperature as registered by the Centigrade thermometer

• A. 30°
• B. 40°
• C. 60°
• D. 80°

Answer 1

Answer: (C)

60°

Answer 2

$\frac{C}{5} = \frac{F - 32}{9}$ ⇒ $\frac{C}{5} = \frac{(140 - 32)}{9}$ ⇒ $C = 60{^\circ}$