(3) Let the investment inscheme A be Rs. x.∴ Investment in scheme B=Rs.(100120X​)=Rs.(56X​)C.I. from scheme A= Rs.[(1+10020​)2−1]=Rs.x(2536​−1)=Rs.2511X​Interest from scheme B=1006X×2×r​=Rs.253xT​∴253xT​2511x​​=911​⇒3r11​=911​⇒ 3r = 9⇒ r = 3% per annum∴ Quantity I = 3%Quantity II,Rate =1800×2432×100​= 12% per annum∴Quantity I < Quantity II