Length of a London Underground carriage

Length of a London Underground carriage (18 m)

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Neat Ratios ...

Length of a London Underground carriage (18 m)

is 1/400 of Length of the longest canal tunnel (Rove Tunnel in France) (7.12 km)...more
is 1/4 of Length of the Great Sphinx of Giza (73 m)...more
is 1/4 of Overall length of an Airbus A380 (72.7 m)...more
is 1/4 of Length of a Boeing 747 airliner (70.7 m)...more
is about as big as Length of a ten pin bowling lane (18.29 m)...more
is about as big as Men's Olympic Triple Jump record (18.09 m)...more
is 2 x World Long Jump Record (1991) (8.95 m)...more
is 2 x Men's Olympic Long Jump record (8.9 m)...more
is 2.5 x Width of a football goal (7.32 m)...more
is 4 x Length overall of a `Finn` racing dinghy (4.5 m)...more
is 4 x Length of a Jaguar E-type coupe (4.43 m)...more
is 5 x Length of a standard full size snooker table (3.57 m)...more
is 10 x Width of a ice-hockey goal (1.8 m)...more

If this was a standard unit ...