A sum of Rs. 9800 gives simple interest of Rs. 4704 in 6 years. What will be the rate of interest per annum?A9%B8.55%C8%D7.5%Answer: C. 8% Read Explanation: Solution:Given:Principal = Rs. 9800Simple interest = Rs. 4704Time = 6 yearsFormula used:Simple interest (SI)=Principal(P)×Rate(r)×Time(T)100(SI) = Principal (P)\times{Rate (r)}\times{\frac{Time (T)}{100}}(SI)=Principal(P)×Rate(r)×100Time(T)SI=P×R×t100SI = \frac{P\times{R}\times{t}}{100}SI=100P×R×tWhere, T is in yearsCalculation:4704=9800×R×61004704 = 9800\times{R}\times{\frac{6}{100}}4704=9800×R×1006⇒R=4704588⇒ R = \frac{4704}{588}⇒R=5884704∴ R = 8% Read more in App