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A cylindrical tower is 14 meters in diameter, and 33 meters in height. Along its outer wall, there is a staircase that spirals around the tower. It goes from the ground floor to the topmost one, and completes one full revolution around the tower. What is the total length of the staircase, in meters? (You may approximate PI to 22/7)

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Solution will be available on 20 May 2016

#### Puzzle No. 20

*Posted on 13 May 2016*A cylindrical tower is 14 meters in diameter, and 33 meters in height. Along its outer wall, there is a staircase that spirals around the tower. It goes from the ground floor to the topmost one, and completes one full revolution around the tower. What is the total length of the staircase, in meters? (You may approximate PI to 22/7)

Click to show/hide hint

Solution will be available on 20 May 2016