Ocean Depth. The average depth of the Pacific Ocean is 14,040 ft, and its depth is 8890 ft...

Ocean Depth. The average depth of the Pacific Ocean is 14,040 ft, and its depth is 8890 ft less than the sum of the average depths of the Atlantic and Indian Oceans. The average depth of the Indian Ocean is 272 ft less than four-fifths of the average depth of the Atlantic Ocean. (Source: Time Almanac 2010) Find the average depth of the Indian Ocean.