Question

A sum of rs. 2000 is invested at 10% per annum simple interest. Calculate the interest at the end of the year. Show that these interest form an



a.P. Using this fact, find the interest at the end of 30 year

Answer 1

Answer:

S.i. Interest = Rs. 200

After 30 years = Rs. 6000

Step-by-step explanation:

S.i. = (2000 × 10 × 1) ÷ 100 = Rs. 200

After 30 years =

(2000 × 10 × 30 ) ÷ 100 = Rs. 6000

Answer 2

General term or nth term of A.P

The general term or nth term of A.P is given by an or tn = a + (n – 1)d, where a = a1 is the first term, d is the common difference and n is the number of term.

Sum of n terms of an AP

The sum of first n terms of an AP with first term 'a' and common difference 'd' is given by

Sn = n /2 [ 2a + ( n - 1) d] or

Sn=n /2 [ a + l ] (l = last term)

SOLUTION IS IN THE ATTACHMENT

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