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A sum of money becomes 77/50 of itself in 18/5 years when invested at simple interest. What is the rate (in percentage) of interest per annum?1). 202). 183). 124). 15 |
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Answer» Let money is Rs. P and RATE is R%. S.I. = Amount - Money = 77P/50 - P = 27P/50 ⇒ 27P/50 = (P × R × 18)/(100 × 5) ∴ R = 30/2 = 15% |
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