Question
Download Solution PDFশঙ্কুর তির্যক উচ্চতা 15 সেমি এবং শঙ্কুর উচ্চতা 12 সেমি। শঙ্কুর মোট পৃষ্ঠের ক্ষেত্রফল
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
শঙ্কুর তির্যক উচ্চতা l = 15 সেমি
শঙ্কুর উচ্চতা h = 12 সেমি
Formula:
শঙ্কুর মোট পৃষ্ঠের ক্ষেত্রফল = πr(r + l)
l2 = h2 + r2
Calculation:
l2 = h2 + r2
⇒ 152 = r2 + 122
⇒ 225 = r2 + 144
⇒ r2 = 225 - 144
⇒ r = √81
⇒ r = 9
∴ শঙ্কুর মোট পৃষ্ঠের ক্ষেত্রফল = π × 9 × (9 + 15) = π × 9 × 24 = 216π বর্গসেমিLast updated on Jul 19, 2025
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