20 inch
You can invent any number of nonstandard units, but none of them is "best". It is best to use standard units, that is, the meter.
The best measurement to use when measuring the width of a house fly is millimeters. This unit is precise enough to capture the small size of the fly, which typically measures about 6 to 7 millimeters in width. Using a ruler or caliper that can measure in millimeters will provide the most accurate results for such a small insect.
4-5 1/2 meters
The width of a standard house key typically ranges from about 0.75 to 1 inch (approximately 19 to 25 mm). However, the exact width can vary depending on the key type and manufacturer. If you need a precise measurement for a specific key, it's best to measure it directly.
The width of a cup typically varies depending on its design and purpose, but standard coffee or tea cups usually have a width ranging from about 3 to 4 inches (7.5 to 10 cm) at the rim. Travel mugs and larger cups may be wider, while espresso cups can be narrower. To get an accurate measurement, it's best to check the specific cup in question.
Well, sweetheart, the best estimate for the width of a classroom would typically be around 20 to 25 feet wide. But hey, if you want to get fancy with it, you can always whip out a measuring tape and get the exact number. Just make sure to watch out for any lurking dust bunnies while you're at it.
Answer: meters
200mm
Best measurement for a phone book is cm or inches.
A millimetre.
milimeters
9 cm
You can invent any number of nonstandard units, but none of them is "best". It is best to use standard units, that is, the meter.
in miles
It's Yard
The metric measurement that is the best estimate for the length of a car is typically in meters or centimeters. This allows for a more precise measurement compared to using larger units such as kilometers.
Inches or centimeters.