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Class 12 Tuition > Learn Class XI-XII Tuition (PUC) > A Clock strikes three ( at 3 AM ). And when it does...
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A Clock strikes three ( at 3 AM ). And when it does so 3 seconds elapse. How long does it take the clock to strike seven ( at 7 AM )?

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Between the three strikes there are 2 intervals, which are each 1.5 seconds long. To strike seven there are 6 intervals. So it will take total 6*1.5 = 9 seconds for seven strikes.
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9seconds
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B.Com, CAIIB, ICWA(Inter) and MBA (Finance).

To strike three times the clock has to make three sounds bong-bong-bong. Total time for the three bongs are 3 seconds. between two bongs there is a time interval and thus for striking three times the clock has to complete two time intervals plus the bong. Hence time interval for each 'dash' is 3/2 =...
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To strike three times the clock has to make three sounds bong-bong-bong. Total time for the three bongs are 3 seconds. between two bongs there is a time interval and thus for striking three times the clock has to complete two time intervals plus the bong. Hence time interval for each 'dash' is 3/2 = 1.5 seconds. Now to strike seven times the clock has to do Bong-bong-bong-bong-bong-bong-bong - and there are 6 time intervals or dashes inbetween. we have earlier seen the time taken for one time interval is 1.5 seconds and hence the time for 6 time intervals is = 6*1.5 = 9 seconds. So the time taken for the clock to strike seven is 9 seconds. read less
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B.Com, CAIIB, ICWA(Inter) and MBA (Finance).

to strike three times the clock has to make three sounds bong-bong-bong. Total time for the three bongs are 3 seconds. between two bongs there is a time interval and thus for striking three times the clock has to complete two time intervals plus the bong. Hence time interval for each 'dash' is 3/2...
read more
to strike three times the clock has to make three sounds bong-bong-bong. Total time for the three bongs are 3 seconds. between two bongs there is a time interval and thus for striking three times the clock has to complete two time intervals plus the bong. Hence time interval for each 'dash' is 3/2 = 1.5 seconds. Now to strike seven times the clock has to do Bong-bong-bong-bong-bong-bong-bong - and there are 6 time intervals or dashes inbetween. we have earlier seen the time taken for one time interval is 1.5 seconds and hence the time for 6 time intervals is = 6*1.5 = 9 seconds. So the time taken for the clock to strike seven is 9 seconds. read less
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Native English Speaker with 32 years experience in teaching English and communication skills.

Obviously 9 seconds
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9seconds
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For 3 Dong Dong Dong the clock takes 3 seconds. Obviously for 7 Dong, Dong, Dong , Dong, Dong, Dong and Dong at 7 A.M. the Clock will take 7 seconds.
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Teaching is my passion!!!!

9 seconds
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