CAT Exam

a cylinder of radius and height both equal to 10cm made by paper is unfolded to form a plane sheet of paper .if circumference of a circle is 2(pi)R then find area of plane paper sheet

Read Solution (Total 2)

circumference is the side of the sheet,so one side of the sheet is 2(pi)R=2*pi*10=20pi
another side is 10cm
area=l*b=20pi*10=200pi
11 years agoHelpfull: Yes(3) No(0)

628.57 cm^2
If height of cylinder=breadth of paper=R=10 cm, then
Length of paper=Circumference of cylinder=2*Pi*R=2*Pi*10=20*Pi
Area of plane paper=Length*Breadth=20*Pi*10=200*Pi=628.57
11 years agoHelpfull: Yes(0) No(0)

CAT Other Question

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