A centigrade and a Fehrenheit thermometer are dipped in boiling water. The water temperature is lowered until the Fehrenheit thermometer registers `140^(@)F` . What is the fall in temperature as register by the centigrade thermometer

Options

A. `30^(@)`
B. `40^(@)`
C. `60^(@)`
D. `80^(@)`

Answer

C

Explanation

For centigrade and Fahrenheit scale
`(F-32)/(212-32) = (C-0)/(100-0) implies C = (100)/(180) xx (140-32) = 60^(@)C`