Here's an interesting one:
A lifeguard stationed on a beach with a straight shoreline sees a
swimmer in trouble 150 meters down the beach and 60 meters out in the
water.
The lifeguard can run 8 m/s on the beach and swim 2 m/s in the water.
What path down the shoreline and out into the water should the
lifeguard take to reach the swimmer in the SHORTEST AMOUNT OF TIME?
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He who waits to do a great deal of good at once, will never do anything.
