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

Answer

C

Explanation

Using `(F-32)/(180)=(C )/(100) rArr (140-32)/(180)=(C )/(100) rArr C =60`
Temperature of boiling water `=100^(@)C`
We get, fall in temperature `=100-60=40^(@)C`