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1.56 xx 10 ^(5) J of heat is conducted...

` 1.56 xx 10 ^(5) ` J of heat is conducted through a ` 2 m^(2) ` wall of 12 cm thick in one hour. Temperature difference between the two sides of the wall is ` 20 ^(@) C ` The thermal conductivity of the material of the wall is (in ` W m^(-1) K^(-1)) `

A

` 0.11`

B

` 0.13`

C

` 0.15`

D

` 1.2`

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