Time Distance

It takes the pendulum of a clock 7 seconds to strike 4 o'clock. How much time will it take to strike 11 o'clock?

  1. 18 seconds
  2. 19.25 seconds
  3. 20 seconds
  4. 23.33 seconds

Answer

The more relevant thing in this case is not the number of strikes but the number of time intervals.

If a clock has to strike 4, there are 3 time intervals between the 4 strikes So, in 7 seconds the pendulum elapses 3 time intervals.

To strike 11, there has to be 10 time intervals, which will take (10 x 7)/3 = 23.33 seconds.

The correct option is D.