A) \[{{17}^{o}}F\]
B) \[{{16}^{o}}F\]
C) \[{{18}^{o}}F\]
D) \[{{19}^{o}}F\]
Correct Answer: A
Solution :
Temperature of machine when it is being used = \[{{161}^{o}}F;\] temperature of machine when left unused for an hour =\[{{144}^{o}}F,\]Drop in temperature of the machine = (161 - 144) =\[{{17}^{o}}F.\]
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