Question

find the compound interest on 100 for 3 years at 5%​

Answer 1

You have not told whether the sum is compounded yearly or half yearly.

So, assuming that the sum is compounded yearly,

Amount=Sum(1+Rate/100)^Number

of years

=100(1+5/100)^3

=100×1.05×1.05×1.05

=115.7625=115.76

Sum=100

So,

Compound Interest=115.76-100=15.76rupees.

Answer 2

Answer:

Rs 15.76

Step-by-step explanation:

Princilpe for 1st year = Rs.100

Interest of 1st year = 100 * 5 * 1

100

= Rs.5

Amount at the end of 2 year = Rs.(100+5)

= 105

P for 2nd year = Rs.105

I of 2nd year = 105 * 5 * 1

= Rs.5.25

A at the end of 2nd year = Rs.110.25

P for 3rd year = Rs.110.25

I of 3rd year = 110.25 * 5 * 1

= 5.5125

A at the end of 3 yrs = Rs115.76

C.I. = Rs ( 115.76 - 100 )

= Rs 15.76

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