railway RRB ALP (CBT 1 + CBT 2 + CBAT) Mock Test Series 2025 (New) General Science Physics Heat and Transfer
A brick wall having a thickness of 24 cm has an inner surface temperature of 25°C and an outer surface temperature of 5°. The rate of heat loss through per square metre of the wall (thermal conductivity = 0.15 J/ (s⋅m⋅k)) is:
1
20.0 J/s
2
18.2 J/s
3
12.5 J/s
4
23.0 J/s