Question
Present ages of P and Q are in the ratio 5:8
respectively. If Q’s age, 14 years hence from now will be 4 times of P’s age, 4 years ago from now, then find the present age of Q.Solution
Let the present ages of P and Q be 5x and 8x years respectively. According to the question, => (8x + 14) = 4 ×  (5x – 4) => 8x + 14 = 20x – 16 => 12x = 30 => x = 2.5 Therefore, the present age of Q = 8x = 20 years
- Calculate the compound interest earned on Rs. 18,000 when it is invested at 10% per annum, compounded semi-annually for 1 year.
- Simple interest on a sum for 2 years is Rs. 300 and compound interest for same period is Rs. 315. Find the principal. (Rate of interest is same for both.)
A person 'P' invested Rs. 'a' in a simple interest (SI) SIP 'X' for 3 years at an annual interest rate of 10%. They also invested...
- The compound interest on a certain principal for 2 years at 7% per annum compounded annually is Rs. 289.80. What will be the simple interest for the same d...
Rahul placed Rs. 40,000 between two investment options, ‘E’ and ‘F’, for 6 years and 3 years, respectively. Option ‘E’ accrues simple intere...
The speeds of boats A and B in still water are in the ratio 5:3. The upstream speed of A is the same as the downstream speed of B. If the stream flows a...
A person invested ₹15,000 in two schemes, Scheme A offering 10% per annum simple interest, and Scheme B offering 12% per annum simple interest. If the...
A certain sum of money becomes Rs. 1250 in 1 year and 3556 in 3 years at certain rate of simple interest. Find the sum of money invested.
The interest earned on investing Rs. 9000 for 2 years at the rate of 10% p.a., compounded annually, is used to purchase an article. If the article is la...
- An amount of Rs. 15,000 is deposited in a compound interest scheme that gives 10% interest for the first year and 14% interest for the second year. Calcula...