Question

At what rate per cent per annum will 4000 yield an interest of 410 in 2 years?​

Answer 1

5%

Step-by-step explanation:

The applicable formula is A = P( 1 + r) ^ n

where A= amount: P is the principal, r, interest rate, n time

In this case,

A = principal + interest = Rs 410 { Rs 4000 + Rs410}

P= Rs 4000

r= ?

n= 2

r is?

4410 = 4000(1 + r) ^2

(1 + i)^ 2 = 4410/4000

(1 + i)^ 2 = 1.1025

1 + i = √1.1025

1 + i = 1.05

i = 1.05 - 1

i = 0.05

0.05 × 100 = 5%