0 m by 14 m house is built on a concrete slab. The interior of the house is at 19C while the ground below the slab is at 11C. The heat-loss rate…

An 6.0 m by 14 m house is built on a concrete slab. The interior of the house is at 19∘C while the ground below the slab is at 11∘C. The heat-loss rate through the floor is 3.7 kW. What’s the slab thickness?