A body takes 4   min to cool from 61 ° C to 59 ° C . If the temperature of the surroundings is 30 ° C , the time taken by the body to cool from 51 ° C to 49 ° C is:

Question

A body takes 4 &#160; min to cool from 61 &#176; C to 59 &#176; C . If the temperature of the surroundings is 30 &#176; C , the time taken by the body to cool from 51 &#176; C to 49 &#176; C is:

Aicharya · Accepted Answer

&#916; T &#916; t = K T t - T S &#160; T t = average temperature T S = surrounding temperature 61 - 59 4 = K 61 + 59 2 - 30 &#160; . . . ( i ) 51 - 49 t = K 51 + 49 2 - 30 &#160; &#160; . . . ii Divide ( 1 ) and ( 2 ) t 4 = 60 - 30 50 - 30 = 30 20 So, t = 6 min

A body takes 4   min to cool from 61 ° C to 59 ° C . If the temperature of the surroundings…

Solution

A body takes 4 &#160; min to cool from 61 &#176; C to 59 &#176; C . If the temperature of the surroundings…

Solution

A body takes 4 min to cool from 61 ° C to 59 ° C . If the temperature of the surroundings…