Oranges with a diameter of about 3 in are to be cooled from room temperature of 25C

Oranges with a diameter of about 3 in are to be cooled from room temperature of 25ºC to 3ºC using an air-convection environment with h = 45 W/m2 · ºC and T∞ = 0ºC. Assuming that the oranges have the properties of water at 10ºC, calculate the time required for the cooling and the total cooling required for 100 oranges.