Q.

On Celsius scale the temperature of body increases by 40°C. The increase in temperature on Fahrenheit scale is                [2024]

1 68° F  
2 70° F  
3 72° F  
4 75° F  

Ans.

(3) 

         C-0100=F-32180

         C=59(F-32)⇒∆C=59∆F

         40=59∆F⇒∆F=72oF

        ∴ 40o change on Celsius scale will corresponds to 72o change on Fahrenheit scale.