One dairy farmer sent off his boy with a message to the melon farmer down the road, and at the same time the melon farmer sent his girl off with a message to the dairy farmer.
One ran faster than the other, and they were seen to cross at a spot 720 yards from the melon farmer’s house. Each stopped 10 minutes at their destination and then started on the return journey, when it was found that they passed each other at a spot 400 yards from the melon farmer’s house.
How far apart are the 2 farmer’s houses? Of course each child went at a uniform speed throughout.
Not many have been able to solve this. So far, we have: