in a hill station the temperature recorded at midnight was -2* c. if the temperature raises by 9 * c the next day afternoon and drops by 11 degree C at 10 pm, what was the temperature will it be now ?

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Solution

$It is given that the temerature recorded at midnight was - 2 ° C . In the next afternoon the temerature raises by 9 ° C . So the new temerature can be obtained by adding the 9 ° C to previous temearature reading . That is the tempearature at afternoon in the next day is, - 2 ° C + 9 ° C = (- 2 + 9) ° C = 7 ° C Now at 10 pm, the temearture drops by 11 ° C . So to find the final temperature, this temearature of 11 ° C must be subtracted from previous reading of temperature . Thus the current temerature is, 7 ° C - 11 ° C = (7 - 11) ° C = - 4 ° C$

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