Published by:
CGP EDU Academic Team
Published on: September 12, 2026
Hot water cools from 60 
to 50 
in the first 10 minutes and to 42 
in the next 10 minutes. The temperature of the surrounding
A
5 
B
10 
C
15 
D
20 
Text Solution
Verified by ExpertsThe correct answer is:
B
For first condition 
⇒ ⇒ 1 = K [55 – θ θ ] ……(i)
For second condition 
⇒ ⇒ 0.8 = K (46 – θ θ ) …..(ii)
From (i) and (ii) we get θ θ = 10 
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
A rod of 40 cm in length and temperature difference of $80^{\circ}C$ at its two ends. Another rod B…
In a steady state of thermal conduction, temperature of the ends A and B of a 20 cm long rod are a…
Four rods of silver, copper, brass and wood are of same shape. They are heated together after wrapp…
The two opposite faces of a cubical piece of iron (thermal conductivity = 0.2 CGS units) are at $10…
Wein's constant is $2892 \times 10^{-6}$ MKS unit and the value of $\lambda_{m}$ from moon is 14.46…
If at temperature $T_{1} = 1000 \mathrm{K},$ the wavelength is $1.4 \times 10^{-6} \mathrm{m},$ the…