A solid is hemispherical at the bottom and
conical above. If the surface areas of the
two parts are equal, then the ratio of
radius and height of its conical part is

• Πr l = 2 Π r 2 (GIVEN)
  
  l = 2r
  
  √h2r2 = 2 r
  
  h2 + r 2 = 4 r2 ..... (SQUARING BOTH SIDES)
  
  h2 = 4r2 - r2
  
  h2 = 3r2
  
  h2/ r2 = 3/1
  
  h/r = √3 /1 ... (SQUARE ROOT BOTH SIDES)
  
  h: r = √3 :1 ....... RATIO ANS.
• 7 years agoHelpfull: Yes(0) No(0)