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प्रश्न
Total surface area of a cylinder of radius h and height r is ______.
उत्तर
Total surface area of a cylinder of radius h and height r is 2πh(r + h).
Explanation:
Given, radius of cylinder = h and height of cylinder = r
... Total surface area of a cylinder = Curved surface area + Area of top surface + Area of base
= 2 × π × Radius × Height + π(Radius)2 + π(Radius)2
= 2πhr + πh2 + πh2
= 2πrh + 2πh2
= 2πh(r + h)
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