A rectangualr paper is 22 cm length and 10 cm width it is rolled into cylinder find its surface area
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surface area of cylinder = area of rectangle
Area of rectangle = length × breadth
22 cm × 10 cm = 220 cm²
Or
let the length of rectangle be height of cylinder and breadth be circumference.
curved surface of cylinder = 2πrh
[circumference of circle = 2πr = 10cm]
curved surface area = 10×22 =220 cm²
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