Multiple choice

An amount of Rs.x at compound interest at 20% per annum for 3 years becomes y. What is y : x? एक x रूपये की धनराशि 20% वार्षिक चक्रवृद्धि ब्याज की दर पर 3 वर्षों में y हो जाती है। y : x क्या है?

  1. 3 : 1

  2. 36 : 25

  3. 125 : 216

  4. 216 : 125

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The compound amount after 3 years at 20% is x(1.2)^3 = 1.728x = 216x/125, giving the ratio y:x = 216:125. Apply the compound interest formula A = P(1+r/100)^t correctly to find the final ratio.