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A small terrace at a football ground comprises of \(15\) steps each of which is \(50 m\) long and built of solid concrete. Each step has a rise of \(\frac{1}{4} m\) and a tread of \(\frac{1}{2} m\) (see Figure). Calculate the total volume of concrete required to build the terrace.
Total volume of concrete required to build the terrace \(=\)
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