Question

the composite figure is made up of two congruent rectangular pyramids joined at their bases. what is the total volume of the composite figure? 30 units³ 60 units³ 120 units³ 180 units³

Explanation:

Step1: Calculate the volume of one pyramid

The formula for the volume of a rectangular pyramid is \(V=\frac{1}{3}lwh\). Here, \(l = 7.5\), \(w=2\), and \(h = 6\).

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Step2: Calculate the total volume of the composite figure

Since the composite figure is made up of two congruent rectangular pyramids, \(V_{total}=2V_1\).

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Answer:

60 units³