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Fist lets start by reviewing what the area of a pyramid is.

Volume of a pyramid (with a rectangular base) is the Area of the Base x Height x 1/3.

Where the 1/3 comes in I don't know but that's the equation.

So we have a rectangle with the sides measuring 9cm x 12cm. The area of a rectangle is S1 * S2 so we have an area of 9cm*12cm=108cm2.

We are given the height (altitude) as 12 cm so now that we know the area of the base, and the height we can find the volume.

V= 108cm2 * 12cm *1/3

V= 1296cm3*1/3

V= 432cm3

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Q: A right rectangular the rectangle base is 9Cm by 12Cm and the altitude of the pyramid is 12Cm find its volume?
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