12Oct/092
Clock Puzzle
Sitting uncomfortably in the doctor’s waiting room one day, I stared at the clock on the wall. I had been waiting for what seemed to be a very long time.
To take my mind off the reason for the visit I started to invent little puzzles to solve.
Estimating the length of the minute hand of the clock to be 4 inches, I calculated the distance the hand had travelled around the clock since I arrived to be 15 inches.
How long had I been waiting?
Sitting uncomfortably in the doctor’s waiting room one day, I stared at the clock on the wall. I had been waiting for what seemed to be a very long time.
To take my mind off the reason for the visit I started to invent little puzzles to solve.
Estimating the length of the minute hand of the clock to be 4 inches, I calculated the distance the hand had travelled around the clock since I arrived to be 15 inches.
How long had I been waiting?
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October 19th, 2009 - 13:08
Time = ( 15 / (2*pi*r) ) * 60 min
where, r = 4 inches
Hence time = 36 min, approx
October 12th, 2009 - 20:31
36minutes.