Spheres `P` and `Q` are uniformally constructed from the same material which is good conductor of
Channel: Doubtnut
Date: 2020-04-12

Spheres `P` and `Q` are uniformally constructed from the same material which is good conductor of heat and the radius of `Q` is thrice the radius of `P`. The rate of fall of temperature of `P` is `x` times that of `Q` when both are at the same surface temperture. Find the value of `'x'` :