Question

400 at 6%pa for 3 years​

Answer 1

Your answer is in the attached picture.

Answer 2

$\huge{SI = \frac{P \times R \times T}{100}}$

$\large\bold {P=400,R=6,T=3}$

$\large \bold{∴SI= \frac{400 \times 6 \times 3}{100} = 72}$