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Mathematics, 23.04.2020 19:13 whitty
A builder makes staircases where each step is 28\,\text{cm}28cm28, start text, c, m, end text long and rises 18\,\text{cm}18cm18, start text, c, m, end text so people don't trip. Every staircase has a stringer — a diagonal support connecting all of the steps.
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A builder makes staircases where each step is 28\,\text{cm}28cm28, start text, c, m, end text long a...
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