As a poser in arithmetic, 30 seconds for 6 o'clock (For the big bell only) means 30 seconds for five gaps, so 66 seconds for 11 gaps at 12 o'clock. These figures are hypothetical.
It actually takes 24 seconds for the preliminary chimes and then 47 seconds for the 12 strikes, a total of 71 seconds.
See the Related Link.
4 seconds
If it takes Big Ben 30 seconds to chine 6 o'clock, then it takes 60 seconds to chime 12 o'clock.
Approximately 30 seconds.
300 seconds
a trillion seconds
8.52 seconds.
Ten seconds
Five seconds.
it would take 75 seconds
2 seconds 2 seconds
2 seconds to 5 seconds
It will take 2.3 seconds to drive 2.3 seconds. This is regardless of your starting and ending points.