On Friday I posted this puzzle…..
Imagine that you are standing on the banks of a straight river. Across from you is a sign on the opposite bank. To your right is a tree. You have nothing to measure with and cannot cross the river. How can you figure out roughly how far you are from the sign?
If you have not tried to solve it, have a go now. For everyone else the answer is after the break.
Walk along the river to the tree, counting your steps as you go. Now count out the same number of steps beyond the tree, turn right by 90 degrees, and walk away from the river until you are in line with the sign and tree (see diagram), counting your steps as you walk. Multiply the number of steps by the distance of a single step, and you will have calculated the rough distance between your original position and the sign. Did you solve it? Any other answers?
I have produced an ebook containing 101 of the previous Friday Puzzles! It is called PUZZLED and is available for theKindle (UK here and USA here) and on the iBookstore (UK here in the USA here). You can try 101 of the puzzles for free here.