A cylinder has 2 flat circular faces and a curved surface. Imagine a tin with a label around the curved surface. Taking the label off the tin and flattening it out gives a rectangle. The length of ...
The area of the base is \(5 \times 5 = 25~cm^2\) The area of each triangular face is \((5 \times 6) \div 2 = 15~cm^2\). There are four identical triangular faces, so the total surface area is \(25 ...
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