Question

find the compound interest when it is compound annually when principal 3200Rs, r 25% per annum and time 3 year.​

Answer 1

Given,

• Principal (P) = Rs. 3200
• Rate of interest (R) = 25%
• Time (t) = 3 year

To Find,

• Compound interest.

According to the question,

Let, compound interest be "R".

We know that,

Compound interest = [ P(1 + R/100)^t - P ]

⇢ R = 3200 (1 + 25/100)³ - 3200

⇢ R = 3200 (100 + 25/100)³ - 3200

⇢ R = 3200 (125/100)³ - 3200

⇢ R = 3200 × 125/100 × 125/100 × 125/100 - 3200

⇢ R = 32 × 125 × 1.25 × 1.25 - 3200

⇢ R = 32 × 195.3125 - 3200

⇢ R = 6250 - 3200

⇢ R = Rs.3050

Therefore,

The compound interest is Rs. 3050.