Binomial Theorem

Question
CBSEENMA11014387

A solution is to be kept between 68°F and 77°F. What is the range in temperature in degree celsius (C), if the conversion formula is given by  

straight F equals open parentheses 9 over 5 straight C plus 32 close parentheses ?

Solution

Solution not provided.
Ans. 20 degree straight C space to space 25 degree straight C

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