iNTELLIGENCE

Two Flies

Two flies are sitting on a column, one at the bottom (x) and the other at the top (y). The distance between them is 126 cm. The column is decorated with a stripe which is winded 3.5 times around the column. The stripe has a bottom silver border and a top golden border. The column's circumference is 48 cm.

Suddenly, the bottom fly starts crawling from point x (the lowermost end of the golden border) along the golden border. At the same time, the other fly at y (the uppermost end of the silver border) crawls downwards along the silver border.

Which distance have the flies covered when they are at the same height?

IQ solution