A sum of Rs. 12,000 deposited at compound interest becomes double after 5 years. After 20 years, it will become

• Answer : [D] 192000
  Explanation :
  
  12000 (1 + R/100)^5 = 24000
  (1+R/100)^5 =2
  [ (1+R/100)^5 ]^4 =2^4
  (1+R/100)^20 =16
  p (1+R/100)^20 =16 p
  12000 (1+R/100)^20 =16*12000
  =192000
• 10 years agoHelpfull: Yes(1) No(2)
• Answer : [D]
  Explanation :
  
  
  12000 x 1 + R 5 = 24000
  100
  
  
  1 + R 5 = 2
  100
  
  
  
  1 + R 5
  100
  4 = 24 = 16
  
  
  
  1 + R 20
  100
  = 16
  
  
  P
  1 + R 20
  100
  = 16P
  
  
  12000 1 + R 20 = 16 x 12000 = 192000
  100
  
• 10 years agoHelpfull: Yes(0) No(1)