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The length of a blackboard can vary depending on the specific blackboard in question. Standard sizes for blackboards typically range from 1.2 meters to 3 meters in length. This would be equivalent to 120 cm to 300 cm or 0.0012 km to 0.003 km. It is important to measure the specific blackboard to determine its exact length in meters, kilometers, or centimeters.
Well, darling, the average length of a blackboard can vary depending on the manufacturer and intended use. Typically, you're looking at around 4 to 8 feet in length for a standard classroom blackboard. But hey, if you're feeling fancy, you can always go bigger or smaller - it's your world, I'm just living in it.
Earthworms vary greatly in their length.
maybe about 1/4 of an inch
about 70feet long