Question

If Re. 1 amounts to Rs. 9 over a period of 20 years, what is the rate of simple interest
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Answer 1

Answer:

si =

$\frac{principal \times time \times rate}{100}$

si

$\frac{9 \times 20 \times 1 }{100}$

=

$\frac{9 \times 1}{5}$

=

$\frac{9}{5}$

Ans = 9÷5