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Q: How can you measure a length of ribbon 750mm long with a 30 cm ruler?
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How can you measure a 650 mm ribbon with a 30 cm ruler?

1 cm = 10 mm. Start with ruler at 0 and mark ribbon at 30 cm. Then place ruler at the mark and measure 30 cm more and make another mark- you are up to 60 cm or 600 mm. Then place ruler at this mark and measure 5 cm, or 50 mm. Now you have a 650 mm ribbon.


How to find length?

Ruler. you measure with a ruler, yard stick, tape measure, or estimate.


How do you measure the length of a country in a map does the ruler have to be straight when finding the length?

Yes, the ruler does need to be straight when finding or measuring the length of a country on a map. If the distance curved, you can use a string and the ruler to measure the length.


Can you measure the length of a line?

A ruler!


What do you measure with length?

You don't measure with length. You measure the length of an object with a ruler. You would use inches or metres as your units.


What is a sentence using the word ruler?

The ruler measured the length of the table to be four feet.


How will you measure the length of an object?

Use a ruler.


Instrument used to measure length in metric system?

there are many instruments used to measure length depending upon the size of object , Ruler is Metric instrument used to measure length. Screw gauge is also used as an instrument used to measure length in mm.


how would measure length of a math book?

I would measure it with a ruler.


What can measure meter square?

Anything that measures length: a 30cm ruler, a metre ruler, a tape measure etc.


What is the length of Saturn?

Sorry my ruler i have cant measure that...


What would you use to measure the length of an object?

a ruler