Question
If a sum of money doubles in 5 years at simple interest,
what is the rate of interest per annum?Solution
Let the principal be P. Simple Interest (SI) = P, since it doubles. SI = P * Rate * Time / 100 → P = P * Rate * 5 / 100. Rate = (100 / 5) = 20%.
More Simple and compound interest Questions
[(7/8 of 640 - 60% of 300) × (√225 ÷ 5)] ÷ (1/4 of 800) = ?
The sum of two numbers is 16 and their product is 63. The sum of their reciprocal is equal to:
30% of 180 + 248 ÷ ? - √256 = 102
323 × 15 + (?)² = 4989
5/2 of 5/6 of 12/5 of 54 % of 5250 = ?
What is the value of 143 + 163 + 183 + … + 303?
4261 + 8234 + 2913 + 8217 + 6283 + 4172 =?
[(36 × 15 ÷ 96 + 19 ÷ 8) × 38] = ?% of 608
19 × ? =361 ÷ 19
(2 ÷ 3) × (4 ÷ 12) × (? ÷ 10) × 45 × (1 ÷ 5) = (? ÷ 6) + (2 ÷ 5)
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