Question
The sum at a certain rate of simple interest becomes Rs.
14880 after 3 years and Rs,16800 after 5 years. Find the simple interest on the same sum at 10% per annum for 4 years (in Rs.)Solution
year      amount 3            14880......(1) 5            16800......(2) difference between eques (1) and (2) 2            =1920 1            =960 equation (1) then interest = 3×960=2880 P=A-SI=14880-2880=12000 P=1200 so now simple interest on the same sum r=10%, t=4year SI= PRT/100 =12000×10×4/100 =4800rs            Â
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