Question 18If 1.2 × 106J of heat energy is given off in 1sec from a vessel maintained at a temperature gradient of 30km-1, the surface area of the vessel is [thermal conductivity of the vessel = 400w/m/k]A.1.0 × 103m2B.1.0 × 102m2C.1.0× 10m2D.9.0 × 102m2Objective Show full explanation