If a certain sum of money at SI doubles itself in 5 yrs then what is d rate?
5% 20% 25% 14.8%

• let the principal be 100
  amount = 200
  si=100
  si=p*n*r/100
  r=100*si/p*n
  r=100*100/100*5
  r=20
• 12 years agoHelpfull: Yes(40) No(6)
• at 20 % rate of SI, money doubles in 5 years.
• 13 years agoHelpfull: Yes(13) No(13)
• let p=x and s.i =x
  put in formula
  (x*r*5)/100=x
  solving get r=20
  i.e r=20%
• 10 years agoHelpfull: Yes(6) No(0)
• use direct formula
  R *T = 100(no of multiples of principle - 1)
  so that R = 100(2-1)/5 = 20%
• 10 years agoHelpfull: Yes(3) No(0)
• 100(n-1)=rt
  where n=2 bcoz sum of money double itself
  r=?
  t=5
  100(2-1)=5*t
  t=20% answer
• 12 years agoHelpfull: Yes(2) No(1)
• let sum be p
  
  amount = principle + S.I
  A = P + (p*t*r)/100
  
  2p = p + (p*5*r)/100
  
  solving we get r = 20
• 9 years agoHelpfull: Yes(2) No(1)
• 20% perfect
• 7 years agoHelpfull: Yes(0) No(0)