Puzzle 19 Solution
Travel time elapsed = (16/66) x 60
= 14 6/11 min
The hands of a clock cross at 12 o'clock and they cross 11 times in 12 hours, which is every
1 1/11 hours, which is:
1 hour 5 5/11min
We are looking at a multiple of that that would end with a 6/11 so that when the 14 6/11 min is subtracted off, it gives a full minute. This can only happen at the tenth time to hands of the hands cross, ie. 10 hours 54 6/11 min after 12:00.
Subtracting 14 6/11 min, we get the time which Jon sets off, which is 10:40
Answer: 10:40
= 14 6/11 min
The hands of a clock cross at 12 o'clock and they cross 11 times in 12 hours, which is every
1 1/11 hours, which is:
1 hour 5 5/11min
We are looking at a multiple of that that would end with a 6/11 so that when the 14 6/11 min is subtracted off, it gives a full minute. This can only happen at the tenth time to hands of the hands cross, ie. 10 hours 54 6/11 min after 12:00.
Subtracting 14 6/11 min, we get the time which Jon sets off, which is 10:40
Answer: 10:40
posted by chorkie @ 11:19 PM
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