Math Puzzle for March 14, 2025

Replacing the belt drive on the family moped

Alameda Post - a larger circle and a smaller circle representing the pulley wheels. A line goes around them like a belt. The distance from the center of one circle to the center of the other is labeled d.

A thin, inelastic drive belt connects two pulley wheels.
The large pulley wheel has a 30-centimeter diameter.
The small pulley wheel has a 12-centimeter diameter.
The distance d between the two axles is 79 centimeters.
Find the length l of the belt loop.

l = ______ centimeters

First correct answer sent to [email protected] wins a gift card for two at Tucker’s Ice Cream of Alameda.

Last week’s answer was Area = 19647.622 square units.

Jeff Smith is a former Math teacher and a retired US Navy Lieutenant Commander. Reach him at [email protected].

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