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Celcius to Kelvin Scale- 20+273= 293K. Celcius to Fahrenheit- 20*9/5+32= 68 K.
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it is degF at the end, not deg K.

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Fahrenheit F = 32 deg + (180/100) * Centigrade

   So 20 C is equal to 32 + 9/5 * 20 = 68 deg F

Kelvin temperature scale or Absolute temperature
       = 273.15 deg + Centigrade temperature

   So 20 deg C is equal to 293.15 deg K

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