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Question

4000 mm = _____m


A
4 meters 20 millimeters
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B
40 meters 20 millimeters
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C
4000 meters 20 millimeters
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D
4 meters 200 millimeters
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Solution

The correct option is A 4 meters 20 millimeters

To convert a smaller unit (mm) to a larger unit (m) we divide by the conversion factor.
Step 1

Convert 4000 mm to cm

We know that 10mm = 1cm
Therefore 4000mm = 4000 ÷ 10

=400010

= 400 cm

Step 2

Convert 400 cm to m

Now we know that 100cm = 1m

400 cm = 400 ÷ 100

=400100

= 4 m

Answer: option A. 4m


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