A sum of rs.P invested on compound interest annually at certain rate of interest and it three times itself in five years. In how many years the amount to 9 times itself at the same rate of interest ? 5 years 8 years 7 years 10 years 12 years Option D 3P = P(1 + R/100)^53 = (1 + R/100)^53^2…
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Sivam invested some money in a scheme at the rate of 20% for 3 years. If he withdraws 40% of total amount and left remaining amount is rs.2304. What is total money which he invested at earlier. 2500 2400 3500 3200 4200 Option B Let principal = 100x SI = 100x * 20/100 * 3 = 60xTotal amount = 100x…
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The difference between compound interest and simple interest on rs.42000 at same rate of interest for 2 years is rs.945. What is the rate of interest ? 10% 15% 14% 20% 25% Option B 945 = PR^2/100^2945 = 42000 * R^2/10000R^2 = 225R = 15% Rohit borrows rs.4000 at 10% on compound interest and at the end of the…
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Rs 12,200 was partly invested in scheme X at 10% p.a compound interest(compounded annually) for 2 year and partly in scheme Y at 10% p.a. simple interest for 4 years. Both the schemes give equal interests. How much was invested in scheme X? Rs 7000 Rs 8000 Rs 9000 Rs 8500 Rs 10000 Option B Let it be Rs x.…
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The Simple intrest on a certain sum for 2 years at 10% per annum is Rs 90.What is the corresponding compound intrest? Rs 91 Rs 97.25 Rs 90.50 Rs 94.50 None of these Option D S.I=(100*90) / (2*10)=Rs 450C.I=450*(1+10)^2 /100 – 450 Mani borrowed a certain sum from Akansha at a certain rate of simple intrest for 2 years.He…
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A principal was put at a certain rate of interest for four years. Had it been put at a rate of interest 4% higher than the previous rate interest, it would have fetched Rs. 80 more. What is the principal? Rs 450 Rs 500 Rs 400 Rs 550 None of these Option B y*4*(r+4)/100 – (y*4*r)/100 =804yr+16y – 4yr =…
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Pratyush lent Rs.21600 to be divided between her two daughters who aged 9 years and 11 years such that both of them would get an equal amount at certain age when lent at rate of 10% SI per anuum. If their investments are in ratio of 51:57 respectively.Then at what age both will received same amount? 9 years 10 years…
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Ramu gave Rs. 5000 to Raju for 2 years and Rs.3000 to Kiran for 4 years on simple interest at the same rate of interest and received Rs.4400 in total from both as interest. Find the rate of interest per annum. 20 30 40 50 60 Option A Let the rate of interest =R%.Then 5000 * 2* R / 100…
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