A container (water equivalent of container is negligible) contains 50gm of water at 0°C. If H amount of heat is extracted per second from water and keeping the spray closed, then whole water freezes in 10 sec. If spray is also working and sprays the water with 2 gm/sec at 0°C, then time delay is seconds in complete freezing compared to previous case keeping the rate of 3 extraction of heat from water same. Then calculate 'x'. (Latent heat capacity of ice = 80 cal/gm) 2gm/sec. Spray H cal./sec water (0°C,50gm)