A right-angled triangle who’s side measure 3 cm,and 5 cm is rotated about the side of length 4 cm.Find the curved surface area of

1 thought on “A right-angled triangle who’s side measure 3 cm,and 5 cm is rotated about the side of length 4 cm.Find the curved surface area of”

1. Answer:

   15π

   Step-by-step explanation:

   By rotating a right angled we get a CONE

   CSA of a cone is πrl

   so the radius is 3 cm

   Because the side length is 4 cm as given in the question

   in πrl : l is slant height

   l^2 = r^2 + h^2

   = 3^2 + 4^2

   = 9 + 16

   = 25 cm

   l = √25

   = 5 cm

   CSA = πrl

   = π*3*5

   = 15π

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