Quicker Maths
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.

Clock Puzzle

Clock Puzzle

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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  1. Time = ( 15 / (2*pi*r) ) * 60 min

    where, r = 4 inches

    Hence time = 36 min, approx


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