Q.9 Find the amount to be paid at the end of 3 years in each case.

(a) Principal = Rs. 1200 at 12% p.a.

(b) Principal = Rs. 7500 at 5% p.a.

(a) Principal = Rs. 1200 at 12% p.a.

(b) Principal = Rs. 7500 at 5% p.a.

(a) Given: Principal = Rs. 1200

Rate of interest = 12% p.a., T = 3 years

\(\therefore \) Interest = \(\frac{P×R×T}{100} \) =\(\frac{1200×12×3}{100} \)= Rs. 432

Amount = Principal + Interest

= Rs 1200 + Rs 432 = ? 1632

(b) Given: Principal = Rs. 7500

Rate of interest = 5% p.a., T = 3 years

\(\therefore \) Interest = \(\frac{P×R×T}{100} \) =\(\frac{7500×5×3}{100} \) =Rs.1125

Amount = Principal + Interest

= Rs. 7500 + 1125 = Rs. 8625