Sunday, December 23, 2012
A puzzle by Harry Langman:
A thin belt is stretched around three pulleys, each of which is 2 feet in diameter. The distances between the centers of the pulleys are 6 feet, 9 feet, and 13 feet. How long is the belt?
from Futility Closet.
Posted by Curmudgeon at Sunday, December 23, 2012