perplexus.info :: Geometry : String around the Cylinder

String around the Cylinder (Posted on 2002-08-09)

A cylinder 90 cm high has a circumference of 24 cm. A string makes exactly 5 complete turns around the cylinder while each of its two ends touch the cylinder's top and bottom respectively.

How long is the string?

See The Solution Submitted by Happy

Rating: 3.3636 (11 votes)

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answer

Comment 6 of 6 |

The required length of the string is sqrt(90^2+120^2) = 150 cm

Posted by K Sengupta on 2007-05-04 12:22:30

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