Question

Which is longer 5 meters or 400 millimeters?

a. 400 millimeters
b. 5 meters
c. both a and b are correct.
d. both a and b are incorrect

Answer 1

1 meter = 1,000 millimeters

This conversion can be understood by the prefix “milli” in millimeter, as “milli” means 1/1000. So, millimeter means 1/1000 of a meter or 10^-3meters.

So, let’s multiply the conversion by 5 since we want to determine if 5 meters is longer than 400mm.

Conversion, where m=meter and mm=millimeter

1m=1,000mm

Since we have an equal (balanced) relationship, if we increase one quantity by 5 times, we must do the same for the other to maintain equality (balance).

1m•5=1,00mm•5

5m=5,000mm

Therefore, 5m is longer than 400mm since 5m=500mm and 500mm>400mm.

Answer: 5 meters is longer

Answer 2

b. 5 meters

Explanation:

1 meter = 1000 millimeters

5 meter = 5000 millimeters

Which is longer 5 meters or 400 millimeters?

5000 > 400

So, the answer is b. 5 meters.