Question

If principal 2400 interest 640 for the 4 years find the rate of interest

Answer 1

Answer:

Let rate of interest be r %

P = 2400

S.I. = 640

time = 4 years

S.I. = (PTR)/100

640 = (2400×4×r)/100

(640×100)/(2400×4) = r

20/4 = r

R = 20/4%

Answer 2

Step-by-step explanation:

S.I = p×r×t /100

640= 2400×r×4 /100

640= 24×r×4

640= 96×r

r = 640/96

= 20/3

r = 6.66%