Ashok has Rs.1000, He invests a part of it at 3% per annum and remainder at 8% per annum, He earns Rs.100 in 2 years. Find the sum invested at different rates of interest?

a) Rs.5000, Rs.500
b) Rs.600, Rs.400
c) Rs.700, Rs.300
d) Rs.300, Rs.700

• Option b
  (600÷100)×3×2=34
  (400÷100)×8×2=64
  Total=100
  
• 7 years agoHelpfull: Yes(2) No(0)
• let sum invest at different rates are x and 1000-x
  Formula : SI=(p*r*t)/100
  so
  100=(x*3*2)/100 +((1000-x)*8*2)100
  10000=6x+16000-16x
  10x=6000
  so, x=600
  and sum=1000-600=400
  so ans B
• 7 years agoHelpfull: Yes(2) No(1)
• b) 600 ,400
  explainat=> (600*2*3)/100 +(400*8*2)/100=36+64=100
• 8 years agoHelpfull: Yes(1) No(0)
• sorry division operator is miss
  so ((1000-x)*8*2)/100
  
• 7 years agoHelpfull: Yes(0) No(0)
• ans:b
  p1=x,t1=2,r=3%
  p2=1000-x,t=2,r=8%
  100=p1t1r1/100+p2t2r2/100
  we get x=600
  then 1000-600=400
  ans RS 600,RS 400
• 4 years agoHelpfull: Yes(0) No(0)