a sum of money become 13,380 after 3 years and 20070 after 6 years on C.I.the sum is?

• let the sum be x and rate be r%
  x(1+r/100)^3=13380........eq1
  x(1+r/100)^6=20070.....eq2
  eq2/eq1:(1+r/100)^3=2007/1338
  using eq1:(1+r/100)^3=13380/x
  thus,13380/x=2007/1338
  thus,x=8920
  
• 10 years agoHelpfull: Yes(0) No(0)
• p(1+r/100)^3=13380 eq-->1
  p(1+r/100)^6=20070 eq-->2
  eq2/eq1 : (1+r/100)^3=669/446
  from eq1 (1+r/100)^3=13380/p
  so p=13380*446/669
  =8920
• 10 years agoHelpfull: Yes(0) No(0)