WATER TEASER
The family were picnicking not far from the river bank at the spot marked X. Maria had gone to fetch some water in a can, but had forgotten her task and wandered off to pick some wild flowers at Y.
‘Where’s the water?’ cried out Mrs Watson. ‘I can’t make tea without water!’ Maria immediately put down her flowers and ran to the river bank, filled the can with water, and ran back to her mother. If Maria took the shortest route from Y to X via the river bank, where on the river bank did she fill her can?