6
AKHIL
·2011-01-24 05:58:56
use the conducn formula and u'll get the ans
1
Vinay Arya
·2011-01-26 22:48:54
Hi Akhil
Would you like to show me?I used the conduction formula but I did not get the answer.
Hi jeetopper
How can b be the right answer.As it is the radius of the bigger shell.And it has been given that the outer surface of the bigger shell is theta2.So at a distance of 3R the temperature is theta2.Please try the problem once again.
11
jeetopper jee
·2011-01-27 05:40:17
sorry c is the answer.
basically what you do is consider a shell of radius r and thickness dr
then dQ/dt=K4∩r2d∂/dr
∫hdr/r2=∫4∩Kd∂
now integrat first R→3R n ∂1→∂2..................1
then R→x n ∂1→∂1+∂2/2.....................2
divide i by 2 to get x