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7th Class Mathematics Integers Question Bank Integer

  • question_answer
    At a shopping mall, the air conditioner is set so that it reduces temperature at the rate of \[{{4}^{o}}C\]every hour. If at 10 a.m. the temperature inside the mail was \[{{35}^{o}}C\] what will be the temperature inside the mail at 6 p.m.?

    A)  \[{{4}^{o}}C\]                               

    B)  \[{{6}^{o}}C\]       

    C)         \[{{3}^{o}}C\]                   

    D)         \[{{7}^{o}}C\]

    Correct Answer: C

    Solution :

    At 10 a.m. temperature inside the mall \[={{35}^{o}}C\] As temperature reduces by \[={{4}^{o}}C\] every hour \[\therefore \] At 6 p.m., temperature inside the mall \[={{(35-(4\times 8))}^{o}}C={{(35-32)}^{o}}C={{3}^{o}}C\]


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