A2.5 m-high, 4-m-wide, and 80-cm-thick wall of a house has a thermal resistance of 0.0125°c/w. the thermal conductivity of the wall is (a) 3.2 w/mk (b) 4.8 w/m-k (c) 6.4 w/m-k (d) 1.6 w/m-k (e) 32 w/m-k

The correct answer is part 'c': 6.4 W/m-K

Explanation:

We know that the thermal resistance of a wall is given by

where,

L = thickness of wall

k = thermal conductivity of wall

A = Surface area of wall

Applying values we get

answer:

what happend?

explanation: