- A20
- B30
- C15
- D25
Step-by-Step Solution
To become 3 times, the interest must equal 2 times the principal, i.e. 200% in 10 years, which is 200 ÷ 10 = 20% per annum.
Answer: A) 20
Under simple interest, what yearly rate (in %) makes a sum grow to three times itself in 10 years?
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