Simple interest on ₹9000 at 5% per annum for 6 months is:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → ₹225
Simple interest is \(\displaystyle \mathrm{SI}=\frac{P\times R\times T}{100}\), with the time T in years, since the rate is per annum. So 6 months is first written as half a year.
\(P=9000\), \(R=5\), \(\displaystyle T=\frac{6}{12}=\frac{1}{2}\) year
\(\displaystyle \mathrm{SI}=\frac{9000\times5\times\frac{1}{2}}{100}=\frac{22500}{100}=225\), so the interest is ₹225