Question

2. In what time will 7500 amount to 8625, if simple interest is reckoned at 7
3. In what time will * 3600 amount to 4320 at 4% per annum simple interest?
4. At what rate per cent per annum will 6300 yield an interest of 2100 in 4 years?
5. At what rate per cent per annum simple interest will 66000 amount to 72720 in 2 years?
6. The simple interest on a sum of money for 5 years is
Hint. Let the sum be x. Then, S.l. =
8. What sum will yield an interest of 7840 in 2 years at 6 -% per annum?
7 7 %
% per annum?
3
of the sum. Find the rate per cent per
annum.
3x
5
7. The simple interest on a certain sum for 3 years at 10% per annum is 7 829.50. Find the sum.
9. At what rate per cent per annum simple interest will a sum treble itself in 16 years?
Hint. Let the sum be * x. Then, amount = * 3x. S.I. = F (3x – x) = 2xc.]
10. A sum when reckoned at 6% per annum simple interest amounts to 7 4130 in 3 years. Find the
sum.
11. A sum of money put at 11% per annum simple interest amounts to 7 10370 in 2 years. What will
it amount to in 3 years at the same rate?
12. A sum of money put at 9% per annum simple interest amounts to 3 10160 in 3 years. What will
it amount to in 2 years at 8% per annum?​

Answer 1

2 I = 7500*7% =₹525
We wish I = 8625-7500=1125
So t =1125/525 = 2+ 1month + 12days