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प्रश्न
Priyanka lends Rs.15,500 at 10% for the first year, at 15% for the second year and at 20% for the third year. If the rates of interest are compounded yearly, find the difference between the compound interest of the second year and the third year.
उत्तर
For 1st year : P = Rs.15500, R = 10% and T = 1 year
Interest = Rs.`(15500 xx 10 xx 1)/(100)`
= Rs.1550
Amount
= Rs.15500 + Rs.1550
= Rs.17050
For 2nd year : P = Rs.17050, R = 15% and T = 1 year
Interest = Rs.`(17050 xx 15 xx 1)/(100)`
= Rs.2557.50
Amount
= Rs.17050 + Rs.2557.50
= Rs.19607.50
For 3rd year : P = Rs.19607.50; R = 20% and T = 1 year
= Rs.`(19607.50 xx 20 xx 1)/(100)`
= Rs.3921.50
Amount
= Rs.19607.50 + Rs.3921.50
= Rs.23529
Difference between the C.I. of the 2nd year and the 3rd year
= Rs.(3921.50 - 2557.50)
= Rs.1364.
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