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According to the Guinness Book of World Records, the world record for spitting a watermelon seed is 68 feet, 9 and 1-eighth inches. Note that there are 2.54 cm in 1 inch. This record was set by a Texan by the name of Lee Wheelis in 1989 - the record distance represents the horizontal distance traveled by the watermelon seed. However, it does include the distance traveled after the seed first hits the ground. For the purposes of this question, let's assume that the horizontal distance traveled before the record-setting seed hit the ground for the first time was 59.0 feet, and that the seed was launched horizontally from a height of 1.60 m. Neglect air resistance in this process (watermelon seeds are notoriously slippery). If you need it, use g = 9.80 m/s2.
What was the seed's launch speed?
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