1.

The temperature at the foot of a mountain is\[{{270}^{o}}C\]. It is \[{{18}^{o}}C\] cooler at its tip. What is the temperature at the tip of the mountain?

A.  \[{{9}^{o}}C\]                               
B.  \[{{18}^{o}}C\]    
C.       \[{{11}^{o}}C\]                 
D.       \[{{45}^{o}}C\]                 
Answer» B.  \[{{18}^{o}}C\]    


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