The average age of A and B is 22 years. If A is to be replaced by C, the average would be 20 years. The average age of C and A is 23 years. Find the age of A.
A + B = 2 × 22 = 44 yr B + C = 2 × 20 = 40 yr C + A = 2 × 23 = 46 yr On adding all three, 2 (A + B + C) = 44 + 40 + 46 = 130 ⇒ A + B + C = 65 ∴ A = (A + B + C) – (B + C) = 65 – 40 = 25 yr
Vishal invested Rs. 3750 at 20% p.a. simple interest for 3 years. After 3 years, he invested the amount received by him at the 20% p.a. compound interes...
The savings of Arun and Bhaskar are same. The difference between the expenditure of Bhaskar and the savings of both Arun and Bhaskar together is 0. The ...
Rs. 5000 when invested at simple interest of r% p.a. amounts to Rs. 6000 in 24 months. If the same sum had been invested for 1 year at compound interest...
What is the compounded amount on a sum of 25,000 after three years at a rate of 12 percent per annum interest compounded yearly?
Mr. Mathur invested Rs. 40,000 with Bank A for 2 years and Rs. 10,000 with Bank B for 4 years at simple interest and earned Rs. 6,000 as interest. Find ...
A man deposited 20% of his salary to a bank which offers compound interest at the rate of 10% p.a. If the interest earned by him from the bank after 2 y...
A certain sum amounts to ₹22,494 in 7 years at x% per annum on simple interest. If the rate of simple interest per annum had been (x + 4) %, the amoun...
'S' undertook an investment endeavor by allocating a capital denoted as 'a + 1000' into a scheme yielding a straightforward interest rate of 20% per ann...
A Motorbike can be purchased on cash payment of Rs. 30000. But the same Motorbike can also be purchased on the cash down payment of Rs 7000 and the rest...
A certain sum of money becomes 4000 in 6 years and Rs. 5400 in 10 years at any certain rate of simple interest. Find the principal amount.
