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?
We make a right triangle of sides 90cm, 120cm, and the hypotenusa represents the string. Using Pitagoras theorem the string is √(90²+120²)=150cm
The string is 150cm long
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Posted by Antonio
on 2003-09-03 12:37:36 |
Solution
