 
 <translate> In the first 4 hours, the milk tanker got 4 hours * 2880 gallons / hour = 11,520 gallons. Thus, the storage tank was left with 30,000 gallons - 11,520 gallons = 18,480 gallons. For the next 7 hrs, the workers added 1,500 gallons / hour * 7 hours = 10,500 gallons. The total therefore is 18,480 gallons + 10,500 gallons = 28,980 gallons. The final answer: 28980. <hau> A cikin sa'o'i 4 na farko, tankar madara ta sami sa'o'i 4 * 2880 galan / awa = 11,520 galan. Don haka, tankin ajiya ya kasance tare da galan 30,000 - galan 11,520 = galan 18,480. A cikin awanni 7 masu zuwa, ma'aikatan sun kara galan 1,500 / awa * awanni 7 = galan 10,500. Saboda haka jimlar ita ce 18,480 galan + 10,500 galan = 28,980 galan. Amsar ƙarshe: 28980. 