Embibe Experts Solutions for Chapter: Heat Transfer, Exercise 1: KCET (UG) 2018

A sphere, a cube and a thin circular plate all of same material and same mass initially heated to same high temperature are allowed to cool down under similar conditions. Then the

A cup of tea cools from $65.5°\mathrm{C}$ to $62.5°\mathrm{C}$ in $1$ minute in a room at $22.5°\mathrm{C}$. How long will it take to cool from $46.5°\mathrm{C}$ to $40.5°\mathrm{C}$ in the same room?