This is the base unit for length in the metric system.
What is the metre.
300
This is the number of yards in 7 inches.
What is 0.19.
300
This is the number of inches in 0.81 km.
What is 31889.76
400
This is the number of mm in 223m.
223 000mm
400
A nautical mile is 1.85km. This is the number of "regular" miles in a nautical mile.
What is 1.15.
400
The tallest man in the world lived to be 8'11". This is his height in cm.
What is 271.78 cm.
500
The world's tallest building is in Dubai. It is 828m. The world's second tallest building is in the United States. It is 628.8m. This is the difference between their height in km.
What is 0.20 km.
500
The longest road tunnel in the world is in Norway. It is 15.2 miles long. The longest rail tunnel is in Japan, and it is 33.5 miles long. The tunnel in Norway would have to be this much longer, in yards, to be the same length as the tunnel in Japan.