A body cools from 71^(@)Cto 69^(@)c in 2 minutes 40 seconds/ What os the required for it to cool its temperature from 61^(@) C to 59^(@) C ?

A body cools from 71^(@)Cto 69^(@)c in 2 minutes 40 seconds/ What os t

1.	A body cools from 71^(@)Cto 69^(@)c in 2 minutes 40 seconds/ What os the required for it to cool its temperature from 61^(@) C to 59^(@) C ?
Answer» SOLUTION :2 MIN, 40S