Question

The lateral surface area of a hollow cylinder is 5220cm^2. If it is cut along its height and formed into a rectangle sheet with the width of 36cm. Find the perimeter of the rectangle

Answer 1

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Answer 2

LSA of hollow cylinder = 5220 cm^2
Width = 36 cm
LSA =2 pie r h =5220
LSA of the cylinder = Area of the rectangular sheet
                 5220= l*b 
                 5220=l*36
             5220/36= l (length)
              145 =l ( length)
    Perimeter of the rectangular sheet = 2(l+b)                    
                                                            = 2 (145 +36)
                                                             = 362 cm^2