Q. In simple interest what sum amounts of Rs.1120/-in 4 years and Rs.1200/-in 5 years ?

Option
(a) Rs. 500
(b) Rs. 600
(c) Rs. 800
(d) Rs. 900

• For 1 year interest= 1200-1120=80
  for 4 year 320
  then sum= 1120-320=800
• 11 years agoHelpfull: Yes(62) No(1)
• 1 year Interest = 1200-1120 = 80/-
  4 year interest = 4*80 = 320.
  
  1120 - 320 = 800 ans. (c)
• 11 years agoHelpfull: Yes(16) No(0)
• (c)Rs 800
  If Sum=P, Interest rate=R, then according to simple interest formula
  P+[(P*4*R)/100]=1120 ,100P+4PR=112000 ---(i) &
  P+[(P*5*R)/100]=1200, 100P+5PR=120000 ---(ii)
  From (i) & (ii), PR=8000 & P=800, R=10
• 11 years agoHelpfull: Yes(12) No(2)
• Sum = Principle(initial amount)+Interest
  
  Interest for 1 yr = 1200-1120=Rs.80
  
  for 4 yrs =Rs.320 , for 5 yrs =Rs.400
  
  therefore, for 4 yrs.......
  
  1120=P+320 => P=Rs.800
  for 5 yrs.......
  1200=P+400 => P=Rs.800
  So P=Rs.800.
• 11 years agoHelpfull: Yes(9) No(0)
• in simple interest, the interest per year is constant
  interest per year = rs (1200 - 1120) = rs 80
  so P = rs (1120 - 4*80)
  = rs 800
• 11 years agoHelpfull: Yes(7) No(1)
• 800 is the answer
• 11 years agoHelpfull: Yes(5) No(0)
• for one year(1200-1120=80)
  for 4 years 80*4=320
  therefore 1120-320=800
• 11 years agoHelpfull: Yes(1) No(0)
• 800
  s.i for 1 year=1200-1120=80
  for 5 years s.i=400
  p=1200-400=800
• 11 years agoHelpfull: Yes(1) No(0)
• P+[(P*4*R)/100]=1120 ,100P+4PR=112000 ---(i) &
  P+[(P*5*R)/100]=1200, 100P+5PR=120000 ---(ii)
  From (i) & (ii), PR=8000 & P=800, R=10
• 11 years agoHelpfull: Yes(0) No(0)
• 1200-1120=80.
  for 1 year rs 80 is interest.
  for 4 year=80*4=320.
  1120-320=800.
  ans=800
  
  
• 11 years agoHelpfull: Yes(0) No(0)
• 1120->4
  1200->5
  1200-1120=80 and 5-4=1 so for 1 year interset is Rs.80
  for 4 years=320
  for 5 years=400
  therefore,original amount=1120-320=800
  or
  original Amount=1200-400=800
  
• 11 years agoHelpfull: Yes(0) No(0)
• c) 800
  (P+P*r*4/100=1120 and P+P*r*5/100=1200)
• 9 years agoHelpfull: Yes(0) No(0)
• c) 800
  1120 in 4 yr
  1200 in 5 yr
  in one yr intrest =1200-1120=80
  in 4r interest =4*8=320
  p=1120-320=800
• 8 years agoHelpfull: Yes(0) No(0)
• simple interest for 1year =1200-1120=80
  for 4years =320
  old money=new money-simple interest
  1120-320
  800
  so answer is C
• 8 years agoHelpfull: Yes(0) No(0)
• For 1 year s.i=1200-1120
  for 5 years=400
  amount=1200-400=800
• 7 years agoHelpfull: Yes(0) No(0)