• # question_answer 22) Find the amount to be paid at the end of 3 years in each case: (a) Principal =  1,200 at 12% p.a.    (b) Principal =  7,500 at 5% p.a.

(a)                 P =  1,200 R = 12% p.a. T = 3 years $I=\frac{PRT}{100}=\frac{1,200\times 12\times 3}{100}=$432 A = P + I = 1200 + 432 =  1,632. Hence, the amount to be paid at end of 3 years is  1,632. (b)                          P =  7,500 R = 5% p.a. T = 3 years                 $\text{I =}\frac{\text{PRT}}{\text{100}}\text{ = }\frac{\text{7,500 }\!\!\times\!\!\text{ 5 }\!\!\times\!\!\text{ 3}}{\text{100}}=$  1,125                 A = P + I $\Rightarrow$               A = 7,500 + 1,125 =  8,625 Hence, the amount to be paid at the end of 3 years is  8,625.