Question
A sum of money becomes four times of itself in 12 years.
Find the rate percent per annum.Solution
Let the sum = Rs. 100 then amount = Rs. 400 then S.I = Rs. 300 = PRT/100 or rate of interest(R) = 300 ×100 /(P×T) = 300 × 100 / ( 100 × 12) = 25%
More Simple and compound interest Questions
What will come in place of the question mark (?) in the following series?
168, 120, ?, 48, 24, 8
120, 126, 138, 162, ?, 306
In each of the following number series, one term is missing. Find the missing term.
121, 100, 81, ?, 49, 36
84, 105, ?, 168, 210, 259
480, 288, ?, 103.68, 62.208, 37.3248
42, 48, 60, 84, 132, ?
- 8, 12, 18, 27, ?
What will come in place of the question mark (?) in the following number series?
21, 42, 67, 96, ?, 166
11          20          ?             64          112        192
...14, 17, 23, 32, ?, 59
