1. Rupa invested P in a scheme offering simple interest at the rate of 12% p.a. If the difference between the interest earned at the end of three years and that earned at the end of five years was 2880/-, what is the value of ‘P’ ?






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  • By: anil on 05 May 2019 01.21 am
    Let the principal = Rs. $$P$$ $$S.I. = frac{P imes R imes T}{100}$$ Acc. to ques, => $$(frac{P imes 12 imes 5}{100}) - (frac{P imes 12 imes 3}{100}) = 2880$$ => $$frac{60P}{100} - frac{36P}{100} = 2880$$ => $$24P = 2880 imes 100 = 288000$$ => $$P = frac{288000}{24} = 12,000$$
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