Q. Braun invested a certain sum of money at 8% p.a. simple interest for 'n' years. At the end of 'n' years, Braun got back 4 times his original investment. What is the value of n

• PA=p
  t=n
  r=8%
  According to question
  p+(pnr/100)=4p
  p[1+n8/100]=4p
  n8/100=3
  n=300/8
  n=75/2
  
• 10 years agoHelpfull: Yes(2) No(0)
• Barun got back 4times of his investment.
  P+I =4P
  I=3P
  now, I=PRN/100
  put,I=3P,n=8
  3P=P*8*N/100
  N=300/8
  N=37.5
• 10 years agoHelpfull: Yes(2) No(0)