2 60 C 4 20 C 1 80 C 3 40 C 19 A cup of tea cools from 80 C

Last updated: 6/5/2023

2 60 C 4 20 C 1 80 C 3 40 C 19 A cup of tea cools from 80 C to 79 9 C in 5 minute If temperature of surroundings is 20 C Then ho much time will it take to cool from 70 C to 69 9 Assume Newton s law of cooling is valid here 1 5 minute 2 6 minute 2 7 minute 4 8 minute