This page in EnglishCette page en français
Xunor the enigmatic
A classical riddle

Classical riddles
Automatic riddles
Easy riddles
Sites to be seen
Thanks Danflyer for this riddle

In Nordistan to cross the estuary Bolka, a sea shuttle service to switch from one bank to another through two boats, the Southern Cross and the North Star.
This morning, both boats leave at 6 am sharp on both piers opposite each located on one side of the estuary.
After each passage, they make a 10 minutes stop to disembark and embark passengers and return to their respective home ports.
The two vessels passed them twice during their return. The first cross takes place 100 m from the middle of the estuary and the second crossing 400 m from a side.

What is the estuary width?

This riddle keeps you busy already since

You can't participate if you already know this riddle before.
If you think have found the solution you can send me this solution by
Last edit for this page: 09/02/2011 (04h20pm)