Question

principal RS=420
rate=7p.c.p.a
time 3hour
find interest =?

Answer 1

p= 420 rs
r= 7%
t= $\frac{3}{24} \times \frac{1}{365} = \frac{1}{8 \times 365}$ year

now interest
=
$\frac{420 \times 7 \times \frac{1}{8 \times 365} }{100} = \frac{420 \times 7}{8 \times 365 \times 100} = \frac{147}{14600} = 0.01007 \: rs$