Question
The difference between compound interest and simple
interest at the same rate for Rs. 3200 for 2 years is Rs. 128. The rate of interest per annum is:Solution
When difference is given between SI and CI for 2 years, then the formula is: CI – SI = P (R/100)2 According to the question, => 128 = 3200 (R/100)2 => R2 = (128 × 10000)/3200 => R = 20%
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
99.99% of 9.99 + 299.98% of 129.98 = ?2Â
456.9 + 328.10 - 122.98 = ? + 232.11
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