Question

In what time will Rs 100 amount to Rs 121 at 10% per annum compound interest?

Answer 1

This is answer

Step-by-step explanation:

Hope it helps you

Answer 2

HEY HERE IS YOUR ANSWER

GIVEN,

P = ₹100

A = ₹121

R = 10%

WE KNOW THAT,

$a = b (1 + \frac{a}{100}) {n}$

$121 = 100(1 + \frac{10}{100} ) {n}$

$\frac{121}{100 } = ( \frac{100 + 10}{100} ) {n\ }$

$\sqrt{ \frac{121}{100} } = ( \frac{110}{100} ) {n}$

$\sqrt{ \frac{11 \times 11}{10 \times 10}} = ( \frac{11}{10} ) {n}$

$( \frac{11}{10} ) {2} = ( \frac{11}{10} ) {n}$

Or,

2 = n years