A wall-clock takes 9 seconds in tringing at 9 O’clock.

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A wall-clock takes 9 seconds in tringing at 9 O’clock. The time, it will take in tringing at 11 O’clock, is
[Note : The wall-clock trings 9 times at 9 O’clock and 11 times at 11 O’clock.]

1. 10 seconds
2. 11 seconds
3. 11.25 seconds
4. 10.80 seconds

Correct Option: B

we can say that the wall-clock trings 9 times at 9 O’clock and 11 times at 11 O’clock .
So , A wall-clock takes 9 seconds in tringing at 9 O’clock. The time, it will take in tringing at 11 O’clock, is 11 seconds .