Question

.At what rate per annum will
Rs.640 amount to Rs.774.40 in 2
years, when interest is being
compounded annually?​

Answer 1

Answer:

A = P (1+ r / 100) n

640(I + r/100) 2 = 774.40

(I + r/100) 2 = 774.40/=7774 / 6400

I + r/100 = v7774/6400 = 88 / 80

= II / 10

r/100 = II/10-1=1/10

r=lo%

rate is 10%

Answer 2

Step-by-step explanation:

A= rs. 774.40

P= rs. 640

N= 2years

R=?

We know that A= P (1+(r/100))^n

rs. 774.40= rs. 640 (1+(r/100))²

774.40/640= (1+(r/100))²

88/80= (1+r/100))²

11/10= (1+r/100))²

1+r/100= 11/10

r/100= 11/10-1

r/100= 1/10

r= 1/10×100

=10% (answer)

That's your answer hope it helps you!