If the sum of the two radii of two circles is 7 cm and the difference of their circumference is 8 cm, then what will be the two circumferences?

• 26cm and 18cm
• 12 years agoHelpfull: Yes(3) No(2)
• 26 cms and 18 cms.
  
  If x and y are their radii, then
  x+y=7
  2*pi*(x-y) = 8
  
  solving these eqns, we get x= 91/22 cms
  y= 63/22 cms
  
  and circumferences of two circles are 26 cms and 18 cms.
• 12 years agoHelpfull: Yes(3) No(2)
• (7*(pi)+4)cm and (7*(pi)-4)cm
• 12 years agoHelpfull: Yes(0) No(2)
• x+y=7
  2pix-2piy=8
  
  nw solve this eqn..
  multyply eqa1 by 2pi.
  
  2pix+2piy=14pi
  2pix-2piy=8
  
  x=14pi+8/4pi
  take pi=22/7
  
  so x=91/22
  y=63/22
• 12 years agoHelpfull: Yes(0) No(1)