[Solved] In how much time will a sum of money double itself at 12% p. (2024)

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1. 6 years 2 months
2. 8 years 1 month
3. 6 years 4 months
4. 8 years 4 months

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Q1.What will be the simple interest on a principal of Rs. 2250 for 5 years at the rate of 6 percent per annum?

Q2.If the simple interest on a certain sum of money at 6% per annum for 8 years is Rs. 4041.60, then the sum is:

Q3.If a bank pays 20% dividend, what rate per cent would a person get by purchasing a share of Rs. 100 for Rs. 150?

Q4.What will be the amount of principal and interest if Rs.860 is invested for 2 years @2paise per rupee per month?

Q5.The simple interest of some principal is its 16/25. If the rate of interest and the time are same, what is the rate of interest?

Q6.What is the rate of interest if a sum of Rs.4000/- becomes Rs.5000/- in 5 years on simple interest?

Q7.The simple interest on Rs. 400 for 5 years at 6% per annum is

Q8.A certain principal amounts to Rs. 500 in 3 years and Rs. 540 in 5 years. Find the rate of interest per annum.

Q9.At simple interest, a sum doubles after 20 years. The rate of interest per annum is

Q10.X took a loan of Rs. 12500 with simple interest for as many years as the rate of interest. If the interest paid at the end of the period was Rs. 18000, then what was the rate of interest?

Q1.What is the difference between Compound interest and Simple Interest on Rs 2000 for one year at 10% p.a If the interest is calculated half-yearly?

Q2.What will be the simple interest on a principal of Rs. 2250 for 5 years at the rate of 6 percent per annum?

Q3.If the simple interest on a certain sum of money at 6% per annum for 8 years is Rs. 4041.60, then the sum is:

Q4.If a bank pays 20% dividend, what rate per cent would a person get by purchasing a share of Rs. 100 for Rs. 150?

Q5.What will be the amount of principal and interest if Rs.860 is invested for 2 years @2paise per rupee per month?

Q6.The difference between compound interest and simple interest on a certain sum of money for three years @ 10% per annum is Rs.248. Find out the principal amount.

Q7.What will be total compound interest of Rs.8000 in 9 months at compound interest rate of 20%, if interest is calculated once in 3 months?

Q8.The simple interest of some principal is its 16/25. If the rate of interest and the time are same, what is the rate of interest?

Q9.In how many years a sum of Rs.5000/- will become an amount of Rs.5832/- at compound interest rate of 8% per annum.

Q10.Nabaghan borrowed Rs. 10000 from a bank at interest rate of 10% and lent the same to two persons at 13% interest. How much profit will he earn after 5 years after repaying bank loan?

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Q1.In a carton, there are total of 45 oranges. One-fifth of the total oranges are rotten. Find the probability that an orange drawn randomly is not rotten.

Q2.Theprofitearned when an article is sold for Rs. 800 is 20 times thelossincurred when it is sold for Rs. 275. At what price should the article be sold if it is desired to make aprofitof 25%.

Q3.The salary of A, B, C are in the ratio of 5 : 3 : 2. If the increment 20%, 25% and 30% respectively are allowed in their salaries, then what will be the new ratio of the salaries?

Q4.A train starts from A towards B with speed 75 km/h. Another train starts from B with speed of 60 km/h towards A. Both of them meet after 12 minutes. Find the distance between A and B?

Q5.An circle is formed by a wire and its area is 154. If any equilateral triangle is formed by the same length of the wire then what will be the area of the equilateral triangle?

Q6.A metal of which 3/7 is zinc and rest is copper be mixed with metal of which 4/7 is zinc and rest is copper what is the ratio of zinc to copper in new mixture?

Q7.What is the difference between Compound interest and Simple Interest on Rs 2000 for one year at 10% p.a If the interest is calculated half-yearly?

Q8.A piece of string is 40 centimeters long. It is cut into three pieces. The longest piece is 3 times as long as the middle-sized and the shortest piece is 23 centimeters shorter than the longest piece. Find the length of the shortest piece(in cm).

Q9.10 girls leave then the ratio of boys to girls is 2:1, when 20 boys leave then the ratio becomes 4:3, find the original ratio of boys to girls.

Q10.Manga travels 760 km to his home, Partly by train and partly by car. He takes 8 hours,if he travels 160 km by train and the rest by car. He takes 12 minutes more if he travels 240 km by train and the rest by car. What are the speeds of the car and the train respectively?