2. A refrigerator of 3000W converts 10kg of water from an initial temperature of 24°C into ice at -8°C. Given specific heat capacity of ice = 2000 Jkg ¹K¹ specific heat capacity of water = 4200 Jkg"¹K¹ specific latent heat of fusion of ice = 336000 Jkg¹¹ a) The refrigerator being 80% efficient, calculate for the above exercise the:- (3) (i) power output, (ii) energy used, (iii) time taken in hours, (iv) cost of electricity at Rs 6.00 a unit. ​