Mathematics · Mensuration
एक खोखले बेलनाकार पाइप के बाहरी और आंतरिक व्यास क्रमशः 10 सेमी और 6 सेमी हैं। यदि इसकी लंबाई 21 सेमी है, तो इसका कुल पृष्ठीय क्षेत्रफल कितना है?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1368π सेमी2✓
- 2472π सेमी2
- 3154π सेमी2
- 4168π सेमी2
सही उत्तर देखें
368π सेमी2
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