An ice box used for keeping eatables cool has a total wall area of `1m^2` and a wall thichness of 5.0 cm. The thermal cunductivity of the ice box is `K=0.01 J//m^@C`. It is filled with large amount of ice at `0^@C` along with eatables on a dfay when the temperature is `30^@C` The latent heat of fusion of ice is `334xx10^3 J//kg`. The amount of ice melted in one day is ( 1 day`=86,000s`)

Explanation

`(d Q)/(dt) = (KA)/(L) d theta = (0.01 xx 1)/(0.05) xx 30 = 6` joule /sec.
Q = 518400 joule Q = mL (L - latent heat)
Ans . M = 1552 gm .