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Q#1 A rectangulad plate with insulated surface is

`10cm`

wide and as compated to its width that inay be consideled infinite in lengths withat introduong an preciable effor if the temperature alang the short edge

`y=0`

is given by

```
x=0x=100\deg C(x,y) Plate.
Answed: u(x,y)=(200)/(\pi ^(2))\sum_(n=1)^(\infty ) ((-1)^(n+1))/((2n-1)^(2))(sin)/((2n-1)\pi x)/(10)
```