Question

find the intrest on Rs100 invested at 4%per annum compound intrest for three years​

Answer 1

Solution

Given:-

• Principle (P) = 500 Rs.
• Rate (R) = 4%
• Time (T) = 3 years.

Find:-

• Compound interest

Explanation

Using formula

★ C.I. = P[(1+R/100)^T - 1]

Keep above values.

==> C.I. = 100*[(1 + 4/100)³ - 1]

==> C.I. = 100 *[ {(100+4)/100}³ - 1]

==> C.I. = 100*[ (104/100)³ - 1]

==>C.I. = 100*[(11,24,864 - 10,00,000)/10,00,000 ]

==> C.I. = 100*[1,24,864/10,00,000]

==> C.I. = 1,24,864/10,000

==> C.I. = 12.4864 Rs.

Thus

• Compound interest = 12.4864 Rs.

__________________

Answer 2

➽ Compound Interest = Rs 12.4864

Step-by-step explanation:

Given:

• Principal (P) is Rs 100.
• Rate (R) is 4%.
• Time (T) is 3 years.

To Find:

• What is the compound Interest after three years?

Solution: For finding Compound Interest, first we have to find out Amount.

★ Amount = P ( 1 + R/100)^n ★

$\implies{\rm }$ A = 100 ( 1 + 4/100)³

$\implies{\rm }$ A = 100 ( 100 + 4 /100 )³

$\implies{\rm }$ A = 100 ( 104/100 )³

$\implies{\rm }$ A = 100 x 1124864/1000000

$\implies{\rm }$ A = 1124864/10000

$\implies{\rm }$ A = 112.4864

Now Compound Interest = Amount – Principal

$\implies{\rm }$ C.I = Rs (112.4864 – 100)

$\implies{\rm }$ C.I = Rs 12.4864