The bankers discount calculated for one year is 21times of his gain. find rate of interest??

a)7%
b)6%
c)4%
d)none

• Bankers Gain = Bankers Discount - True Discount
  And True Discount = (BG*100)/Time*Rate
  as given BD = 21 BG and time =1 year
  so
  BG=21BG - (BG*100)/Time*Rate
  by solving it R= 5 % so answer should be none
• 8 years agoHelpfull: Yes(12) No(10)
• it is none
• 8 years agoHelpfull: Yes(1) No(3)
• Bankers Gain = Bankers Discount - True Discount
  And True Discount = (BG*100)/Time*Rate
  as given BD = 21 BG and time =1 year
  so
  BG=21BG - (BG*100)/Time*Rate
  by solving it R= 5 %
• 8 years agoHelpfull: Yes(0) No(0)
• it is none
  
• 7 years agoHelpfull: Yes(0) No(0)
• r=100* 1x/21*x
  100x21x=4%
• 7 years agoHelpfull: Yes(0) No(1)
• B.D=B.G-T.D
  
  and, TD=21 B.G - B.G
  Therefore, T.D=20 B.G
  B.G=(T.D*R%*Time) /100
  B.G=(20 B.G * R% *1) /100
  Therefore, R%=5
• 7 years agoHelpfull: Yes(0) No(0)
• BG=BD-TD
  AND TD=(BG*100)/TIME*RATE
  AS GIVEN BD=21 BG AND TIME=1 YR
  SO BG=21BG-(BG*100)/TIME*RATE
  AFTR SOLVING SOLUTION IS 5%
  SO ANS:NONE
• 7 years agoHelpfull: Yes(0) No(0)