Two identical solid hemispheres of equal base radius r cm are stuck together along their bases. The total surface area of the combination is?
مساوی بنیاد کے رداس آر سینٹی میٹر کے دو ایک جیسے ٹھوس نصف کرہ اپنی بنیادوں کے ساتھ ساتھ چپکے ہوئے ہیں۔ مجموعہ کی سطح کا کل رقبہ کیا ہے؟
Answer: 4nr2
Explanation
By joining two hemispheres along their bases we have a sphere.
Total surface area of sphere = 4×πr2
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