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CBSE Class 7 Answered

What is conversion of temperature scale celsius to fahrenheit and Fahrenheit into Celsius. 
Asked by shajinair354 | 22 Aug, 2019, 09:07: PM
answered-by-expert Expert Answer
The temperature in Fahrenheit scale can be converted to Celsius scale or vice-versa by using,
 
C space equals open parentheses space fraction numerator F minus 32 over denominator 9 end fraction close parentheses cross times 5 
For example, 
 
If temperature is measured in Fahrenheit scale is 32 °F , then it can be converted to Celsius scale as follows:
 
C space equals open parentheses space fraction numerator F minus 32 over denominator 9 end fraction close parentheses cross times 5

C space equals space open parentheses space fraction numerator 32 minus 32 over denominator 9 end fraction close parentheses cross times 5 space equals space 0  
 
 
Thus, 32°F = 0ºC  
 
Now, if the temperature is measured in Celsius scale is 25 °C , then it can be converted to Fahrenheit scale as follows:
Using the same formula we get, 
 
Substitute value of Celsius scale in equation, we get
 
C space equals open parentheses space fraction numerator F minus 32 over denominator 9 end fraction close parentheses cross times 5

fraction numerator 25 space cross times 9 over denominator 5 end fraction equals space F minus 32
rightwards double arrow F equals 45 space plus 32
rightwards double arrow F space equals space 77
 
Thus, 25°C = 77°F 
 
 
 
Answered by Shiwani Sawant | 23 Aug, 2019, 11:59: AM
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