Question

p = 1200 R = 12%pa T = 3 y

Answer 1

after 3 years.. borrower give = 1200 +432 = 1632

Answer 2

Given :-
Principal (P) = Rs.1200
Rate of interest (R) = 12% p.a
Time (n) = 3years

$S.I = \frac{P \times R \times T}{100} \\ \\ S.I = \frac{1200 \times 12 \times 3}{100} \\ \\S.I = 432$
S.I = Rs.432