Puzzle #50: Crossing the river
14 March 2020
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From New Scientist #3273, 14th March 2020 [link] [link]
Petal is on her way to a country fair, to sell some vintage kitchenware belonging to her good friend Gretel. As she walks along the River Biddle admiring the view, Petal trips on a pair of oars left carelessly on the bank. A valuable wrought-iron kettle flies out of her hand and lands on one of the river’s many marshy islands.
From the river bank to the island is 3 metres directly across, and though the oars are sturdy enough to walk on, they are just short of reaching over the water.
How can Petal reach reach the island with the paddles and save Gretel’s metal kettle from its muddy peril?