In a particular time, a sum becomes 3 times of itself on simple interest at the rate of 10% per annum. What is the rate of interest if the same sum becomes 5 times of itself in the same duration?
Answer & explanation
Correct answer: option 3
Principal : Amount : S.I. ⇒ Rate
3 times ⇒ 1 : 3 : 2 ⇒ 10%
⇓ ×2 ⇓ ×2
5 times ⇒ 1 : 5 : 4 ⇒ 20%