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A clock tower (Posted on 2002-04-24) Difficulty: 3 of 5
A clock tower bell sounds to mark off every hour with the number of bells equal to the hour (three consecutive bells sound at three o'clock, etc). The last bell marks the exact beginning of the hour.

The sounding of the bells for six o'clocks starts at 30 seconds before six.

Assuming that the bells are always evenly and equally spaced in time, how long before noon must the sounding of the bells begin?

See The Solution Submitted by levik    
Rating: 2.4000 (10 votes)

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Solution Solution | Comment 11 of 13 |

at 30 secs to 6, there are 5 bells to be rung in 30 seconds - 30/5 = 6 seconds between each bell. An algebraic formula for the amount of time taken to ring the bells for each hour would be 6(y-1) where y is the number of bells to be rung. Following this equation, 6x(12-1) = 6x11 = 66 seconds to noon when the bells should start ringing. POP.


  Posted by sassy on 2004-04-12 13:34:30
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