Answer:
(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.
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