Question

At what rate of simple interest will RS.4500 double itself in 10 years?.​

Answer 1

Principal= ₹4500

The sum will double itself in 10 years.

so,

Amount= ₹(2×4500)

= ₹9000

so,

simple interest or SI = Amt-principal

= ₹(9000-4500)

= ₹4500

So,

$rate = \frac{si \times 100}{p \times time} \\ = \frac{4500 \times 100}{4500 \times 10} \\ = \frac{100}{10} \\ = 10\%$

So,

Rate % is 10%

Hope this helps you.