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Volume of a cylinder with radius h and heigth r is __________.

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Curved surface area of the cylinder of radius h and height r is ________.

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Total surface area of a cylinder of radius h and height r is _________.

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Area of rhombus = product of _________.

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Two cylinder A and B are formed by folding a rectangular sheets of dimensions 20cm 10cm along its length and also along its breadth respectively. Then volume of A is __________ of volume of B.