The difference between SI and CI on certain sum of money for 2 years at 10% annum is rs 15. find the sum of money

a)1500
b)1300
c)1400
d)none

• S.I=P*2*10/100= P/5= 0.2*P
  
  AMOUNT=P*(1+10/100)^2 = 1.21*P
  C.I. = 1.21P - P = 0.21*P
  
  hence difference between S.I. and C.I. is 0.21P - 0.2P = 0.01P
  15 = 0.01*P
  P=1500
  
  
• 9 years agoHelpfull: Yes(6) No(0)
• option(a) is correct
• 9 years agoHelpfull: Yes(2) No(0)
• Difference of C.I. and S.I. (C.I. - S.I.)=P*(r/100)^2.... { for 2 years}
  (C.I. - S.I.)=P*(r/100)^2 * (300+r)/100......{ for 3 years}
  .
  .
  hence 15=P*(10/100)^2
  P=1500
• 9 years agoHelpfull: Yes(1) No(0)
• a.1500
  SI =20 CI=21 for 10% p.a
  1 part 15 then 100 parts 1500.
• 7 years agoHelpfull: Yes(0) No(0)