The train will have travelled 500 kilometres when they meet (half way). At a speed of 100kph it will require 5 hours. At a speed of 150 kilometres an hour during 5 hours, the fly will have flown 750 kilometres
Problem 2 | The Cake
Solution:
First knife movement:: Slice it horizontaly in two equal parts.
Second knife movement: Slice it verticaly in two equal parts.
Third knife movement: Slice it verticaly (at a straight angle, 90°) from the second movement.
