Dentists use concave mirrors to see teeth and other areas in the mouth. This is because a concave mirror forms a virtual, erect and enlarged image when the object is placed within focus.
The interest earned when a sum is invested at simple interest of 25% p.a., for 3 years, is Rs. 9000. What will be the total amount received after 2 year...
Simple interest on a certain sum at the rate of (50/3)% per annum for three years is Rs. 1250. Find the sum.
A certain sum of money invested at R% p.a. fetches a compound interest (compounded annually) of 1560 and simple interest of Rs.1500 at the end of 2 year...
Rs. (2x + 400) is invested at a rate of 20% per annum, yielding an interest of Rs. 3200 after 4 years. Calculate the interest earned when Rs. (x + 100) ...
A sum of money doubles itself in 4 years in how many years it will be 5 times?
A principal amount is invested at an annual simple interest rate of R%, growing to Rs. 9,500 over 5 years and Rs. 13,100 over 9 years. Calculate the tot...
When invested at x% p.a. simple interest for 16 years, Rs. 'p' becomes five times its own value. Determine the value of "p" if Rs. (p + 240) invested at...
Some amount out of Rs. 12000 was lent out at 10% per annum and the rest amount @ 16% per annum and thus in 5 years the total interest from both the amou...
A sum of Rs. 4500 is invested at simple interest for 2 years. If the rate interest for first year is 15% p.a. while 25% p.a. for second year, then find ...
Rs. (y-1500) was invested in scheme J on (R-1)% per annum on compound interest. Rs. ‘y’ was invested in scheme K on (R+1)% per annum on simple inter...
