## Difference between CI and SI of Three Years question :

**Example 1:** Find the approximate difference in the simple interest and the compound interest on an amount of Rs. 2800/- @ 12 p.c.p.a at the end of three years ?

**Answer :**** Formula** this type of problem is when given three years.

CI – SI = P(R / 100)^{2} x (300 + R / 100)

2800 x (12)^{2} x (300 + 12) / 100 x 100 x 100

= Rs. 126

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sir how to find ci-si for 4 years,,is their any trick to find,,,,simple method is lenghty

Koi dhan ci se 15 years me double to jata hai to kitne years me apne se 8 guna ho jayega