Question
Present ages of ‘A’, ‘B’ and ‘C’ are in the
ratio 12:13:16, respectively. If present average age of ‘A’ and ‘C’ is 28 years, then find the age of ‘B’ when ‘C’ was 20 years old?Solution
Let the present ages of ‘A’, ‘B’ and ‘C’ be ‘12x’ years, ‘13x’ years and ‘16x’ years, respectively. ATQ; (16x + 12x) ÷ 2 = 28 Or, 28x = 56 So, x = 2 So, present age of ‘C’ = 16 × 2 = 32 years Present age of ‘B’ = 13 × 2 = 26 years Difference between the ages of ‘B’ and ‘C’ = 32 – 26 = 6 years So, age of ‘B’ when ‘C’ was 20 years old = 20 – 6 = 14 years
if the interest is compounded half-yearly, calculate the amount when the principal is Rs.4000, the rate of interest is 22%.solve the question
If a sum of money invested on simple interest becomes 4 times of itself at 'R%' p.a. in 6 years, then find the value of '0.4R'.
In how much time will a sum of Rs. 5250 amounts to Rs. 9870 at the rate of 11 percent per annum at simple interest?
Mr. P invested Rs. ‘4x’ in scheme ‘A’ offering simple interest of 25% p.a. and reinvested the interest earned from scheme ‘A’ at the end of ...
A man invests Rs X in a scheme at 12% rate of interest for 8 years. After 8 years he reinvests the amount received at same rate of interest for same tim...
Krishna invests a certain amount at an annual simple interest rate of 9% for 2 years. The total amount he receives after this period is then reinvested ...
Piyush initially took a loan from Vivek at a simple interest rate of 8% per annum, and after a duration of two years, he repaid the borrowed amount. Sub...
A man invested a certain amount of sum at 12.5% per annum simple interest and earned an interest of Rs.2800 after 4 years. If the same amount is investe...
A sum of ₹8,000 is invested at 10% per annum simple interest for 2 years . What is the simple interest earned?
A man deposited Rs. 9000 at 10% compound interest, compounded annually while Rs. 8500 at 13% simple interest per annum. What will be the difference betw...
