Question

A sum of 1000 is invested at 8% per annum simple interest. Calculate
the interest at the end of each year. Show that these interest form an AP
Using this fact, find the interest at the end of 30 years.
​

Answer 1

Answer:

ANSWER

amount =1000

interest=1000×

100

8

=80

interest after 2 year =2×1000×

100

8

=160

interest after 3 year =3×1000×

100

8

=240

I

3

−I

2

=I

2

−I

1

80=80

Thus, interest forms A.P.

I

30

=1000×

100

8

×30=2400

The interest at the end of 30 years is Rs.2400

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Answer 2

Answer:

amount =1000

interest=1000× 100 =80

8

interest after 2 year =2×1000× 100

8

=160

interest after 3 year =3×1000× 100

8

=240

80=80

Thus, interest forms A.P.

I

30

=1000× 100 ×30=2400

8

The interest at the end of 30 years is Rs.2400

Step-by-step explanation:

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