I would look around the house for a tape measure or a ruler that's longer than the table.
If I couldn't find one of those, I'd have to use a ruler that's shorter than the table, but that's messy and less accurate.
centimeters
the same as it would be if you measured it with a tape measure as long as you were accurate
Length of the table is 10 feet.
A metres, for an approximate measure, a centimetre for a more accurate measure.
The side of the table is 12 inches long.
centimeters
The best unit to measure the length of a science table would typically be meters or centimeters, depending on the table's size. For larger tables, meters provide a convenient measurement, while centimeters offer more precision for smaller dimensions. If the table length is in the range of typical household furniture, centimeters would be the most practical choice. For example, a standard science table might measure around 120 cm in length.
The length can be found by taking the larger number in the frequency group and subtracting it to find the range.
the same as it would be if you measured it with a tape measure as long as you were accurate
Length of the table is 10 feet.
Grams is no good - it is a measure of weight not length. Kilometers measure length - but only if your table-top is a few miles long. Most appropriate would be Meters - your average dining table is about one-and-a-half meters long.
A metres, for an approximate measure, a centimetre for a more accurate measure.
take Area/Length
That depends on the length of your lab table.
The side of the table is 12 inches long.
A table is typically not the length of a kilometer; it is generally much shorter, usually ranging from a few feet to several meters in length. A kilometer is equivalent to 1,000 meters, making it impractically long for a standard table. Such a length would be more suited for a long stretch of land or a large outdoor installation rather than a piece of furniture.
The length of a pencil. your waist/chest measurement the dimensions of a table