Computer · Building Construction
3 m की मंजिल की ऊंचाई के लिए, एक सिंगल-फ्लाइट सीढ़ी का प्रस्ताव है। यदि राइज़र (riser) की ऊंचाई 150 mm है, तो इस फ्लाइट में ट्रेड (tread) की संख्या कितनी होगी?
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