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Explanation: DOS is an early operating system that runs from a disk drive.
Simple interest earned on an amount of Rs. 1250 at rate of R% per annum after 4 years is Rs. 250. Find the simple interest earned on an amount of Rs. 13...
The simple interest on a sum of money is 9/35 of the sum. If the number of years is numerically 5/7 times of rate percent per annum, then the rate perc...
A sum of money, when invested at an annual compound interest rate of 'r%', amounts to Rs. 3,600 after 2 years and Rs. 4,320 after 3 years. Determine th...
A certain sum is invested at a simple interest rate of 10% per annum for a certain period. If the sum becomes five times the principal at the end of the...
A certain sum of money invested at R% p.a. fetches a compound interest (compounded annually) of 1630.5 and simple interest of Rs.1500 at the end of 2 ye...
Rs. 7000 is invested in scheme ‘A’ for 2 years and Rs. 5000 is invested in scheme ‘B’ for 2 years. Scheme ‘A’ offers simple interest of 15% ...
A sum of ₹6,450 is invested for 3.5 years at a certain annual rate of simple interest, yielding a total interest of ₹2,709. If ₹3,500 is then inve...
Rs. 14000 invested for 2 years in a scheme offering compound interest (compounded annually) of 15% p.a. gives an interest that is Rs. 20 less than the i...
A man invested certain sum at simple interest of r% p.a. such that it amounts to 170% of itself in 7 years. Find the interest earned when Rs. 2800 is in...
