Doubt from heat transfer

I can't even approach this question. Any ideas on how to write the equations?

@Unik_2018 @Vivek_Pamnani @Amay_2018.

1 Like

Got it..


Try the first one too

Due to network issue cant upload..will do it by night.

I feel u can go ahead with differential eqn.

1 Like

Ok. :+1:

Is the answer 11 sec?

I mean 10+x=11

Yeah. How?

Assume that B is at any radial distance x
Mag of velocity = √ radial^2 + tangential ^2
Now the omega of A = w of B
So tangential velocity = wx

Now u get function of radial velocity as a function of radius..
Integrate from 0 to r