Question

a certain amount to Rs4400 in 2 years and to Rs 4600 in 3 years find the principal and rate of interest

Answer 1

Amount in 2 years = Rs 4400

Amount in 3 years. = Rs 4600

Therefore Interest in 1 year = Rs(4600-4400)

=Rs 200

Therefore Interest in 2 years = Rs (200 X 2)

= Rs 400

Therefore principal = Amount - Interest

= Rs(4400-400)

= Rs 4000

Therefore let rate of interest be = x % p.a

Therefore ATQ

200 = 4000 X 1 X x / 100

Therefore x = 5

Therefore Rate % per annum = 5 % per annum

Ans. Principal = Rs 4000

Rate = 5% per annum