The temperature across two different slabs A and B are shown I the steady state (as shown Fig) The ratio of thermal conductivities of A and B is

Options

A. `2 : 3`
B. `3 : 2`
C. `1 : 1`
D. `5 : 3`

Answer

B

Explanation

`(K_(A)A(20))/(3)=(K_(B)A(30))/(3)`