Let the present ages of A and B are 4x years and 7x years respectively. Age of B after six years = 7x + 6 years Age of C after six years = (7x + 6) × 3/2 = ‘10.5x + 9’ years Present age of C = 10.5x + 9 – 6 = ‘10.5x + 3’ years According to question: 4x + 7x + 10.5x + 3 = 3 × 44 21.5x + 3 = 132 21.5x = 129, x = 6 So the present age of A = 4 × 6 = 24 years Present age of C = 10.5 × 6 + 3 = 63 + 3 = 66 years So the desired difference = 66 – 24 = 42 years
Ajay invested Rs.a in SI at 7% rate of interest per annum for 10 years. Vishal invested the same amount in SI at 5% rate of interest per annum for 8 yea...
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A sum is lent on compound interest for 2 years at 14% p.a. If the compound interest on the sum is Rs.5392.8, find the sum.
A man purchases some number of apples at the rate of 36 apple for Rs. 1. How many for a rupee did he sell to gain 12.5%.
If the ratio of the sum invested and simple interest received after 1 year is 25:7 respectively, then find the rate of interest.
A man invested Rs. 16,000 at simple interest of 'x%' p.a. and received Rs. 32,000 after 2 years. If he had invested Rs. 21,000 at simple interest of 'x%...
R' invested an amount of Rs. 'r' for a duration of 4 years, while 'S' invested Rs. 6000 for 18 months. The ratio of their respective profits is 16:9. De...
Anoop invested a sum at a simple interest rate of 8% per annum, and it grew to Rs.1,850 in 6 years. If the same sum is invested at a compound interest r...
Rs. 'x' is invested in scheme 'A' offering simple interest such that interest earned after 5 years is Rs. 600. If the amount received is further investe...
A certain sum of money becomes 3 times of itself in 10 years at simple interest. In how many years does it become double of itself at the same rate of s...
