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The thermal conductivity of a metal plat...

The thermal conductivity of a metal plate is 80 `w//mk`. If the thickness of the plate is 0.5 cm and heat is conducted at the rate of `2.5 xx 10^6 W//M^2`. The temperature difference across the two faces of the plate is about

A

`156^@C`

B

`60^@C`

C

`30^@C`

D

`10^@C`

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