Question

An amount of Rs x at compound interest at 20% per annum for 3 years becomes y. What is y : x ?

(a) 3 : 1 

(b) 36 : 25 

(c) 216 : 125 

(d) 125 : 216

Answer 1

(c) 216 : 125

P = Rs x, A = Rs y , r = 20% p.a., n = 3 years

\(\therefore\) y = x\(\big(1+\frac{20}{100}\big)^3\) 

\(\Rightarrow\) y= x\(\big(\frac{6}{5}\big)^3\) \(\Rightarrow\) \(\frac{y}{X}\) = \(\frac{216}{125}\)