a) 8%

b) 9%

c) 10%

d) 12%

correct answer is: b) 9%

Here,

Principal =₹ 3600

Amount =₹ 4734

Time =\ 3\frac{1}{2} years or \frac{7}{2} years

We know,

S.I. =\left(amount\ -\ principle\right)

\rightarrow S.I. =₹\left(4734\;-\;3600\right)

\rightarrow S.I =₹ 1134

We also know, Rate =\frac{100\times S I}{P\times T}

\rightarrow Rate =\frac{100\times1134\times2}{3600\times7}

\therefore Rate = 9% **Ans:** The percent rate is 9%.