1. Dalajit lent Rs 10800 to Jaabir for 3 years and Rs 7500 to Kabir for 2 years on simple interest at the same rate of interest and received Rs 1422 in all from both of them as interest. The rate of interest per annum is
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By: anil on 05 May 2019 02.17 am
Let rate of interest per annum = $$r\%$$ Sum lent to Jaabir = Rs. 10,800 for 3 years and Rs. 7500 to Kabir for 2 years Simple interest = $$frac{P imes R imes T}{100}$$ => Total interest = $$(frac{10800 imes r imes 3}{100}) + (frac{7500 imes r imes 2}{100}) = 1422$$ => $$324r + 150r = 1422$$ => $$474r = 1422$$ => $$r = frac{1422}{474} = 3\%$$ => Ans - (C)
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