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In an Air conditioner compartment of a t...

In an Air conditioner compartment of a train, a material of thermalvconductivity K and thickness 10 cm is required to fullfill the purpose. To do so there is a need of two glass each of thickness 1 cm with air gap of 8 cm between them. If thermal conductivity of glass and air are `1 W//mk and 0.01 W//mk` then the value of thermal conductivity K is

A

`0.0125 W//mk`

B

`0.05 W//mk`

C

`0.255 W//mk`

D

`0.33 W//mk`

Text Solution

Verified by Experts

The correct Answer is:
A
`(10)/(KA) = 2 xx 1/A + 8/(0.01A) implies K = 0.0125`.
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