the temperature of a hot metallic rod is 278 degree.If it is made to cool off at the rate of 5 degree every minute,then what is the temperature after 15 minutes

Dear student

Rate of cooling=1°/minTemperature after 1 min=-5°Temperature that will drop down after 15 min=-5°×15=-75°Present temperature=278°So, temperature of rod after 15 min=278°-75°=203°
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it is cooled at the rate of=1degree per min
temperature after minute=-5 degree
temperature after 15minute=-5*15degree
                                  ​              =-​​75
present temperature=278
temperature after 15 minute=278-75=203degree

 
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