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10,000 kilometers per hour is about 70,000,000,000 times as fast as Grass growing
In other words, it's 69,000,000,000 times the speed of Grass growing, and the speed of Grass growing is 0.0000000000140 times that amount.
(for Kentucky Bluegrass, Poa pratensis) (a.k.a. Smooth Meadow grass, a.k.a. Common Meadow grass) (Summer months, ideal growing conditions)
Kentucky Bluegrass, one of the most common grasses in North America, grows about 0.000000150 kilometers per hour in the summer months under ideal conditions. When left un-mowed, Kentucky Bluegrass grows to heights of 60 to 90 cm (2 to 3 ft) and blossoms with a blue flower.
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