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There are 6 feet in one fathom. Therefore, 20 feet is equal to 20/6 = 3.3 recurring (that is, 3.3333...) fathoms.
Son of Svengoolie - 1978 The Beast from 20000 Fathoms 1953 1-139 was released on:
USA: 13 March 1982
Answer: .27 fathoms
Gigantor - 1964 Trap at 20 Fathoms 1-25 was released on:
USA: 1964
200 million - 200 000 000
20 billion - 20 000 000 000