
Last updated at Dec. 12, 2018 by Teachoo
Transcript
Ex 11.3, 8 The lateral surface area of a hollow cylinder is 4224ใ ๐๐ใ^2. It is cut along its height and formed a rectangular sheet of width 33 cm. Find the perimeter of rectangular sheet? Given that Hollow cylinder is converted into a rectangular sheet So, Area of cylinder and sheet must be the same โด Curved Surface Area of hollow cylinder = Area of rectangular sheet 4224 = Length ร Breadth 4224 = ๐ ร 33 4224/33 = ๐ ๐ = 4224/33 ๐ = 128 cm Now, Perimeter of sheet = 2 ร (Length + Breadth) = 2 ร (128 + 33) = 2 ร 161 = 322 cm
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