Narendra,

As per the formula - Compound Interest = P(1+i)t-P

Here P - Principal amount, i - interest rate, t- the time period

So Compound Interest = 10000(1+10)20 - 10000

= 10000(11)20-10000

= 67,275-10000

So, Compound Interest =57,275

Narendra,

As per the formula - Compound Interest = P(1+i)t-P

Here P - Principal amount, i - interest rate, t- the time period

So Compound Interest = 10000(1+10)20 - 10000

= 10000(11)20-10000

= 67,275-10000

So, Compound Interest =57,275