If x:y=5:3 then (8x-5y) : (8x+5y)=?

A.) 5:13 B.) 13:5
C.) 5:11 D.) 11:5

• Ans is option C = 5:11
  
• 7 years agoHelpfull: Yes(0) No(0)
• x : y = 5 : 3 then (8x-5y) : (8x+5y)=?
  =( (8*5) - (5*3) ) : ( (8*5) + (5*3) )
  = (40-15) : (40+15)
  divided by 5 on both side below the value
  =25 : 55
  = 5 : 11
• 7 years agoHelpfull: Yes(0) No(0)
• Let x,y=5k,3k
  Now(8x-5y):(8x+5y)=(8*5k-5*3k):(8*5k+5*3k)
  (40k-15k):(40k+15k)=25k:55k=5:11
• 2 years agoHelpfull: Yes(0) No(0)