In the Temperature of Air Above a Pond Is 8°C

Multiple Choice

In the temperature of air above a pond is 8°C thermal conductivity of ice is 0.005 C.G.S. units, latent heat of fusion of ice is 79.9 cal/gram the density of ice is 1 gm/cu.m, the time taken for the formation of ice layer of 1 cm thickness is

A) 200 seconds
B) 100 seconds
C) 12.5 seconds
D) 10 seconds
E) None of the above