Question: How many miles is the racing circuit in which Jack Dunfee played one of the "Bentley Boys" before the Second World War?
Sentence (from "Jack Dunfee"): Jack Lawson Dunfee (26 October 1901 – 13 September 1975) was a British motor racing driver, theatrical impresario, and later farmer who was one of the "Bentley Boys" at Brooklands before the Second World War.
Relevant evidence: Yes