a rectangle has an area of 12 m

^{2}and a width of 400 cm . what is the length of the rectangle ?a rectangle has an area of 12 m^{2} and a width of 400 cm . what is the length of the rectangle ?

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Oakland Gardens, NY

This problem involves two different types of measurements: meters and centimeters.

We want all the measurements in a problem to be same.

So let's first convert 400 cm to meters.

We know 100 cm = 1 meter (this should be memorized) so 400 cm must be 4 meters

This is an algebra problem so in any algebra problem you always want to write out the
algebraic equation.

The algebraic equation for area of a rectangle is length times width or

A = L x W.

The problem gives us the area: A= 12 meters squared

And the width: W= 4 meters

Let's rearrange the equation to find and isolate length: L = A / W

Now we just plug in: L = 12 meters / 4 meters

12 divided by 4 = ?

Now we just plug in: L = 12 meters / 4 meters

12 divided by 4 = ?

Melbourne, FL

A = 12 m^{2}

W = 400 cm = 4m

A = LW ⇒ L = A/W = (12 m^{2}) / (4m) = 3m

The length is 3m.

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