Question

At what temperature, the reading of a fahrenheit thermometer will be three times that of celsius thermometer?

Options

• 0° F

• 160° F

• 320° F

• 80° F

Answer 1

80° F

Explanation:

Let reading of celsius scale be x° C

∴ reading of fahrenheit scale will be 3x° F

`because ("t"_"f" - 32)/180 = ("t"_"c" - 0)/100`

`therefore (3"x" -32)/180 = "x"/100`

`therefore 15"x" -160 =9"x"`

`therefore 6"x" = 160° "C"`

`therefore 3"x" = 80° "F"`